The finance officers of the company XYZ wants to calculate total income collected from a no of customers. Every customer is registered as typeA, typeB or typeC customer. TypeA, typeB and typeC customer pay 100, 200, and 300 birr each respectively. Write an algorithm that gets the customer type and calculate the subtotal income for each type and the total income collected by the finance officer from its entire customer. Invalid type entry must be anticipated and properly handled Pseduocode