Please explain using C programming, I would like to understand it.

Suppose, you are working in a store and you are tasked to check inventory. There are n different items in the inventory. For each item, you know its available amount and unit price. Your manager has given you a list that has the required amount of each item in the inventory. You are required to check the inventory to see if you have enough amounts of each item. If not, you must order for remaining amounts of items. Write a program that calculates the remaining amounts and the total cost of the order. For this problem, your input would be an integer n (number of different items) and 3 different arrays of size n. The arrays will have the unite price, available amount and required amount of each item respectively