Formula insert in blank columns

Hello everyone,
I am new to excel and I am learning different formula and functions. I have attach a copy of the spreadsheet to this. My question is I have items and cost per item on the top. Now the lower part is item, quantity, price per item, and total. I have to Create appropriate formulas into the following cells: C14 & D14. I am somewhat lost because with A14 and B14 it is blank. I was going to try to use match in the item so if they type in the item number they would get the price. Then if they insert the quantity it will times by the price per item and that would be the total. Now I have messed with it but it is not working for me. Is it possible to do that or what would another way I should work this since A13,B13,C13,D13 is blank. Thanks for reading.