I need for help. Why 2019 is wrong? Thank you

Comprehensive Problem 11-71 (LO 11-1, LO 11-2, LO 11-3, LO 11-4, LO 11-5, LO 11-6) [The following information applies to the questions displayed below.] Moab Inc. manufactures and distributes high-tech biking gadgets. It has decided to streamline some of its operations so that it will be able to be more productive and efficient. Because of this decision it has entered into several transactions during the year. (Do not round intermediate computations.) a. Moab Inc. sold a machine that it used to make computerized gadgets for $27,300 cash. It originally bought the machine for $19,200 three years ago and has taken $8,000 in depreciation. b. Moab Inc. held stock in ABC Corp., which had a value of $12,000 at the beginning of the year. That same stock had a value of $15,230 at the end of the year. c. Moab Inc. sold some of its inventory for $7,000 cash. This inventory had a basis of $5,000. d. Moab Inc. disposed of an office building with a fair market value of $75,000 for another office building with a fair market value of $55,000 and $20,000 in cash. It originally bought the office building seven years ago for $62,000 and has taken $15,000 in depreciation. e. Moab Inc. sold some land held for investment for $28,000. It originally bought the land for $32,000 two years ago. f. Moab Inc. sold another machine for a note payable in four annual installments of $12,000. The first payment was received in the current year. It originally bought the machine two years ago for $32,000 and has claimed $9,000 in depreciation expense against the machine. g. Moab Inc. sold stock it held for eight years for $2,750. It originally purchased the stock for $2,100. h. Moab Inc. sold another machine for $7,300. It originally purchased this machine six months ago for $9,000 and has claimed $830 in depreciation expense against the asset. Required information Individuals, partners, Scorporation shareholders, and all others. If line 7 is zero or a loss, enter the amount from line 7 on line 11 below and skip lines 8 and 9. If line 7 is a gain and you didn't have any prior year section 1231 losses, or they were recaptured in an earlier year, enter the gain from line 7 as a long-term capital gain on the Schedule D filed with your return and skip lines 8, 9, 11, and 12 below. 8 2,000 8 Nonrecaptured net section 1231 losses from prior years. see instructions. Subtract line 8 from line 7. If zero or less enter-O. If line 9 is zero, enter the gain from line 7 on line 12 below. If line 9 is more than zero, enter the amount from line 8 on line 12 below and enter the gain from line 9 as a long-term capital gain on the Schedule D filed with your return. See instructions 27.100 Part II Ordinary Gains and Losses (see instructions) 10 Ordinary gains and losses not included on lines 11 through 16 (include property held 1 year or less Machinery 2019 2020 7.300 830 9,000 (870) 0 0 0 (Enter as negative) 11 12 2.000 8.000 13 11 Loss, if any, from line 7 12 Gain, if any, from line 7 or amount from line 8. If applicable 13 Gain If any, from line 31 14 Net gain or loss) from Form 4684 lines 31 and 38a 15 Ordinary gain from installment sales from Form 6252, line 25 or 36 14 15 9,000 nnn 12 A BRANCO