Within a given distribution channel, the following information is available concerning trade margins and costs. A wholesaler has a unit selling price of $220 and a unit cost of $130. The retailer requires a 39% markup on selling price. The manufacturer has a unit variable costs of$37. Calculate the wholesaler percent markup on cost. Report your answers as a percentage and round to the nearest percent.

(Correct answer is 69)

Can you please show me how (69) is the correct answer? thank you