1970 - 1973 Tonka Toys Percent Profit Calculator
Circa 1970 - 1973 Tonka Percent Profit Calculator
Before there were electronic computers, there were slide rulers. The Tonka percent profit calculator is just a variation on the slide rule to easily help the Tonka retailer determine his profit based on unit and/or case purchases and a couple of other variables. The Tonka logo helps narrow the year of use from 1970 to 1973. The calculator measurers approximately 4.5" by 4.5" and is made of two pieces of die cut colored plastic.