Exercise 10: The Price List"Asyouknow,weofferourpreferredcustomersquantitydiscounts,"HelenMaher began."Oftentimes,suchapricingschemeisdifficulttocommunicate,andwesometimesmake mistakesincalculatingthetotalcostofacustomer'sorder.""For example, here are the pricing terms for product SG15:"Price per unit for the first 1,000unitsis$1.00 Price per unit for the next 500unitsis$0.90Price per unit for units above1,500is$0.80."WhatI'dlikeisasimplespreadsheetthatcancalculatewithouterrorthetotalcosttoa customerasafunctionofthecustomer'squantityordered.Iwantitsothatanyonecanputinthe number ordered and then clearly find out the total cost to the customer. I'd also like the spreadsheettobeflexibleenoughsothatatsomelaterdateIcanchangeeitherthequantitybreak points(the1,000andthe1,500)orthethreeprices(the$1.00,$0.90,and$0.80)."