of the following programs uses arithmetic operations, along with storage and retrieval?

a$.$ A sales program compares the sales values from two different products and displays the larger value on the screen.

b$.$ An engineering program allows a user to key in two numbers and does a variety of different calculations with those numbers.

c$.$ A point$-$of$-$sale program reads data keyed in by a sales representative and saves it on a hard disk.

d$.$ An accounting program reads data from a flash drive, increases the sales values by $20\%,$ and displays them on the screen before saving them back on the flash drive.