I am new in cmsc and I am confused about the Problem I met in my homework.

Write a program to read the parts.txt file and display the cost of inventory for each of the part classes. The file contains parts of class A, B, C and D. A typical line in the file would be:

P-11191 A 10 34.29

This is part number P-11191, a class A part, of which there are 10 in stock and each costs $34.29. Your program, therefore, would add 342.90 to class A inventory.

Content of parts.txt:(sry i don't know if it is possible to upload a txt file in Chegg so I copied and pasted it)

P-11191 A 10 34.29

P-13192 C 65 76.98

P-11196 B 39 59.04

P-11226 C 29 24.46

P-14036 A 41 67.24

P-14124 B 7 69.20

P-14175 B 41 9.21

P-14226 D 14 28.95

P-14455 D 26 26.39

P-14493 A 29 22.09

P-14518 D 9 5.56

P-14613 A 49 74.66

P-14702 A 38 92.06

P-14748 C 24 24.80

P-14786 D 22 5.55

P-14976 C 45 22.16

P-15122 B 47 17.96

P-11245 D 45 0.93

P-11273 D 15 21.48

P-11281 B 40 66.47

P-11376 D 50 27.03

P-11646 D 42 23.58

P-11702 B 21 24.74

P-11754 B 27 15.23

P-31763 A 13 130.56

P-12009 D 3 12.80

P-12131 A 48 24.17

P-12385 B 41 27.33

P-12652 E 18 28.33

P-12677 D 15 26.59

P-12746 A 6 111.57

P-12746 C 25 14.83

P-12797 D 18 29.07

P-12856 A 33 120.96

P-13289 C 45 36.61

P-13682 D 14 25.56

P-13713 A 10 35.12

P-13725 A 23 61.46

P-13726 B 12 51.08

P-13754 D 27 4.56

P-13947 C 34 27.71

P-13982 C 17 10.47

P-13987 D 17 27.24

P-13999 B 12 33.01

P-15825 E 27 25.76

P-15902 C 22 26.10

P-15944 D 33 15.94

P-16100 A 40 94.38

P-16283 A 44 108.99

P-16414 C 43 5.12

P-16420 D 12 25.72

P-16467 B 28 72.51

P-16803 D 44 13.61

P-17160 D 23 11.61

P-17243 A 7 69.19

P-17248 D 42 10.50

P-17295 C 2 9.26

P-17344 C 42 36.05

P-17345 B 3 33.14

P-17550 B 23 6.75

P-17644 B 24 2.62

P-17668 D 15 8.86

P-17788 F 34 9.84

P-17833 B 14 25.95

P-17871 C 4 11.70

P-18158 D 25 22.26

P-18553 A 39 5.31

P-18638 C 35 31.64

P-18827 A 26 99.28

P-19041 B 45 63.99

P-19152 A 28 133.91

P-19378 C 44 26.01

P-19505 B 7 54.98

P-19780 A 33 44.66

P-19798 D 17 22.09

P-19842 D 38 5.01

P-19943 D 30 17.46

P-19965 C 34 17.07

P-20097 A 2 26.46

P-20120 B 2 72.45

P-20126 D 6 7.17

P-20143 B 43 38.61

P-20206 B 17 39.00

P-20353 D 8 8.40

P-20486 A 20 186.81

P-20491 B 32 43.20

P-20864 C 27 33.88

P-20884 C 33 27.90

P-21071 A 28 146.96

P-21092 A 43 83.53

P-21282 C 37 10.50

P-21326 F 18 12.09

P-21499 D 30 20.19

P-21599 B 42 41.83

P-22018 B 47 46.58

P-22025 E 25 18.95

P-22083 A 45 3.64

P-22123 F 14 11.51

P-22204 A 46 100.85

P-22254 C 2 7.98

P-22391 B 47 6.69

P-22526 C 37 9.14

P-22547 C 15 32.88

P-22554 A 50 41.31

P-22604 A 10 125.74

P-22757 B 12 47.19

P-22844 D 10 0.50

P-23038 A 29 2.33

P-23102 A 11 56.07

P-23146 D 6 16.89

P-23379 D 43 19.29

P-23506 C 40 14.41

P-23975 D 5 6.84

P-24183 D 13 10.63

P-24253 A 40 120.22

P-24286 B 23 54.52

P-24383 C 44 9.01

P-24613 B 50 57.98

P-24675 E 21 14.22

P-24692 D 33 29.45

P-24724 B 45 6.45

P-24910 A 23 14.27

P-24991 D 34 28.48

P-24992 C 123 45.00

P-25157 A 32 84.01

P-25366 A 37 32.37

P-25405 D 2 8.61

P-25482 A 13 71.09

P-25513 B 15 76.05

P-25549 C 8 4.78

P-25564 D 24 13.30

P-25594 C 16 32.59

P-25602 B 39 15.05

P-25606 C 42 16.95

P-25648 C 3 25.89

P-25746 A 35 90.57

P-25895 D 39 26.89

P-25923 C 2 26.08

P-26188 C 48 32.37

P-26298 A 40 76.50

P-26377 C 21 21.78

P-26382 C 39 15.99

P-26408 F 9 0.37

P-26574 A 38 7.96

P-26576 C 13 23.59

P-26853 A 10 118.43

P-26868 A 2 125.05

P-27191 C 34 20.39

P-27225 C 34 14.28

P-27345 A 28 195.43

P-27417 C 42 1.61

P-27586 B 16 24.21

P-27648 D 10 1.39

P-27785 B 46 26.75

P-27812 C 5 18.37

P-27850 A 46 181.07

P-27873 B 13 102.37

P-27945 D 42 10.44

P-27969 C 2 12.52

P-27987 C 49 5.37

P-28009 A 2 60.77

P-28061 A 35 117.29

P-28309 B 28 34.06

P-28509 D 26 12.95

P-28510 D 13 16.13

P-28518 C 1 22.53

P-28690 A 45 19.34

P-28943 A 21 121.80

P-29044 D 14 6.17

P-29059 D 9 29.82

P-29096 A 49 106.39

P-29182 A 11 26.83

P-29183 E 46 29.59

P-29185 A 28 73.08

P-29279 C 42 12.55

P-29518 A 17 147.52

P-29549 F 10 7.95

P-29637 B 18 87.18

P-29722 C 25 20.74

P-30037 C 37 22.19

P-30383 A 31 124.74

P-30538 B 1 2.86

P-30591 A 9 40.47

P-30643 A 7 81.94

P-30659 B 17 88.97

P-31007 A 3 11.77

P-31071 B 46 0.36

P-31136 A 29 89.83

P-31429 C 43 5.85

P-31497 A 38 28.12

P-31585 C 8 44.39

P-31701 B 35 51.74

P-31722 A 31 191.32

P-31739 B 24 71.54

P-31744 C 45 15.03

P-31859 D 24 29.54

P-31969 C 20 17.44

P-32291 A 37 188.37

P-32382 C 44 29.54

P-32417 C 11 27.06

P-32467 C 15 2.73

P-32556 A 44 31.13

P-32599 B 43 66.23

P-32890 A 11 95.99

P-32901 D 32 4.44

P-33017 D 33 5.70

P-33066 C 25 30.27

P-33140 A 32 26.49

P-33143 B 45 44.69

P-33155 D 10 15.25

P-33195 C 11 24.63

P-33224 D 15 8.96

P-33382 C 46 3.44

P-33481 D 20 17.22

P-33491 C 32 24.65

P-33593 C 3 3.52

P-33597 A 2 28.85

P-33643 C 21 5.09

P-34050 B 16 18.99

P-34099 D 49 0.70

P-34106 A 24 63.59

P-34490 F 4 1.65

P-34503 C 7 8.64

P-34512 B 2 69.17

P-34554 A 33 11.27

P-34627 B 22 73.36

P-34670 B 39 112.66

P-34689 B 29 16.06

P-34711 C 1 23.09

P-34743 D 22 25.21

P-34826 B 16 111.01

P-34883 B 49 45.64

P-34991 B 10 41.79

P-34997 A 12 156.00

P-35146 B 6 62.55

P-35349 A 46 80.95

P-35432 A 36 69.73

P-35797 A 4 94.76

P-35809 B 30 30.69

P-35867 D 35 20.86

P-35936 B 22 31.21

P-35961 F 32 0.57

P-36143 D 29 9.53

P-36145 A 5 83.35

P-36728 A 15 120.47

P-36826 C 19 18.52

P-36830 B 41 25.29

P-36895 C 11 31.64

P-37009 D 8 23.64

P-37402 C 49 26.02

P-37494 C 1 28.88

P-37504 C 11 13.09

P-37542 B 39 26.43

P-37674 B 17 31.02

P-38033 A 12 70.61

P-38087 B 29 37.76

P-38108 C 44 23.04

P-38247 A 15 128.48

P-38388 C 37 20.84

P-38434 D 49 7.31

P-38460 C 47 28.68

P-38684 B 13 20.30

P-38757 A 30 191.64

P-38806 C 42 31.39

P-38870 A 29 127.19

P-38880 B 26 110.57

P-39014 A 30 111.33

P-39319 B 26 3.38

P-39457 A 16 102.14

P-39499 B 32 37.50

P-39819 B 13 18.71

P-40002 B 9 86.81

P-40021 C 45 27.28

P-40100 B 9 40.04

P-40426 D 32 11.67

P-40784 B 4 106.76

P-41213 C 23 16.53

P-41254 D 5 11.13

P-41316 C 17 33.99

P-41359 A 44 132.94

P-41383 C 2 2.62

P-41644 D 43 3.40

P-41740 A 25 186.21

P-41754 D 4 20.07

P-41828 D 45 26.95

P-41936 A 11 59.17

P-42059 A 12 78.86

P-42117 C 19 3.07

P-42217 D 45 16.88

P-42259 B 29 73.98

P-42329 A 43 93.94

P-42381 A 37 188.53

P-42634 F 16 7.67

P-42788 C 38 21.88

P-42792 C 36 17.68

P-42936 A 18 129.79

P-43179 A 47 35.60

P-43264 B 31 103.81

P-43367 B 5 32.39

P-43378 A 46 6.38

P-43521 C 25 26.27

P-43582 B 3 13.18

P-43622 A 10 155.36

P-43672 A 38 17.97

parts parts Notepad File Edit Format View Help P-11191 A 10 34.29 P-13192 C 65 76.98 P-11196 B 39 59.04 P-11226 29 24.46 P-14036 A 41 67.24 h003 P-14124 B 7 69.20 P-14175 B 41 9.21 P-14226 D 14 28.95 P-14455 D 26 26.39 P-14493 A 29 22.09 p001- P-14518 D 9 5.56 P-14613 A 49 74.66 P-14702 A 38 92.06 P-14748 C 24 24.80 P-14786 D 22 5.55 P-14976 C 45 22.16 P-15122 B 47 17.96 P-11245 D 45 0.93 P-11273 D 15 21.48 P-11281 B 40 66.47 P-11376 D 50 27.03 P-11646 D 42 23.58 P-11702 B 21 24.74 P-11754 B 27 15.23 P-31763 A 13 130.56 P-12009 D 3 12.80 P-12131 A 48 24.17 P-12385 B 41 27.33 P-12652 E 18 28.33 P-12677 D 15 26.59 P-12746 A 6 111.57 P-12746 c 25 14 83