Advanced Calculator Activities - Pretend & Play Author:Olga Gonzalez-Granat Calling all young entrepreneurs! This illustrated activity book takes a kid-approach to the world of earning, spending and calculating money which contains activities designed to reinforce and build basic computation skills involved in calculating percentages, sales tax, discounts and hourly wages, and much more. (Includes Answer Key) Note: For ... more »use with the Pretend & Play® Calculator Cash Register (LER 2629) or a 4-function calculator. Recommended for ages: 8 & up (LER 2639)« less