Final answer:
To find the retail price of the checkers sets, add the 86% markup to the cost price of $18.
Step-by-step explanation:
To find the retail price of the checkers sets, we need to calculate the 86% markup on the cost price. The cost price of each set is $18, so we can calculate the markup as follows:
Markup = 86% of $18 = $18 x 0.86 = $15.48
To find the retail price, we add the markup to the cost price:
Retail price = Cost price + Markup = $18 + $15.48 = $33.48
Therefore, the retail price of the checkers sets is $33.48.