#include /*assume the following function is written for an electronic storefront. the user will enter the id of the item to be ordered, as wellas the quantity of units that they would like to purchase. the program will then lookup the price for the price for theitem using a predefined function, and returnthe total cost of the order\.\*/int gettotalcost(){char itemid[9]; int price, unitsordered, cost; printf(" enter the 9-digit id of the item to be ordered: "); scanf("%s", & itemid); /* lookup the price according to the itemid */price = getpricebyid(itemid); printf(" enter the quantity of units to be ordered: "); scanf("%d", & unitsordered); cost = price * unitsordered; return cost; }