Balloon Emporium sells both latex and Mylar balloons. The store owner wants a program that allows him to enter the price of a latex balloon, the price of a Mylar balloon, the number of latex balloons purchased, the number of Mylar balloons purchased, and the sales tax rate. The program should calculate and display the total cost of the purchase. Complete an IPO chart for this problem. Plan the algorithm using pseudocode.

Desk-check the algorithm using $1.50 as the latex balloon price, $2.50 as the Mylar balloon price, 5 as the number of latex balloons purchased, 10 as the number of Mylar balloons purchased, and .04 as the sales tax rate. Then desk-check it using $1.25, $3.75, 10, 4, and .06.