Comparison program of prices in price sheets in exel

Employer
[no-member:pro]Yana[/no-member:pro]Yana
Project parameters
Type of cooperationOne-time project
SectionSoftware development
Prepaymentwithout prepayment
Payment methodsElectronic money
Acceptance of requestsclosed
Project description
You need to write a program or add-on to compare 2 price lists (exel files), and output the result of comparing prices in the form of a table. I need information: old price, discount in percentage (if possible), new price, difference.
It is also desirable to search the results by product code and / or name.
It is also desirable to search the results by product code and / or name.