Software Sales A software company sells a package that retails for $99. Quantity discounts are given according to the following table. Quantity Discount 10-19 20% 20-49 30% 50-99 40% 100 or more 50% Write a program that asks for the number of units sold and computes the total cost of the purchase. Input Validation: Make sure the number of units is greater than 0.

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