Use reasoning to lead to the answer of the following question:
A store owner buys clothes wholesale and adds 80% to the wholesale price to set the retail price. The retail price of a pair of pants is $36. What is the wholesale price?

20
Let X be the wholesale price.

The retail price of a pair of pants is X + X * 80% = $36.

Thus 1.

8 * X = $36.

Thus X = $36 / 1.

8 = $20.

.

The final answer: 20