what is the formula to compute the sales of pencils in March and to compute total sales during April

O Home 8 Excel_Chap4_Assignment V2 (1) - Excel P age Layout Formulas Data Review Search View Help llyanna Insert Draw B C D E F K L M N O P roblem 4 878 104 Instructions Worksheet Product contains monthly sales for six products. Use the INDEX function to compute the sales of Pencils in March. Use the INDEX function to compute total sales during Notebook Pencil Pen Marker Folder Paper January February March April May 243 766 397 14 889 452 826 530 895 949 214 616 813 909 388 864 382 57 779 389 895 328 June 232 742 167 361 431 280 286 753 402