Answer :
EXPLANATION
If the original price is $36 and the markup is 5%, we need to add the markup.
We can get this multiplying the original price by the following formula:
[tex]\text{Markup \%=}\frac{\text{Selling price-Cost}}{\text{Cost}}\cdot100[/tex]Replacing terms:
[tex]\frac{5}{100}=\frac{\text{markup}-36}{36}[/tex]Multiplying both sides by 36:
[tex]\frac{5}{100}\cdot36=\text{markup}-36[/tex]Adding 36 to both sides:
[tex]\frac{5}{100}\cdot36+36=\text{markup}[/tex]Computing terms:
[tex]\text{1}.8+36=\text{markup}[/tex]Adding terms:
[tex]37.8=\text{markup}[/tex]The retail price is $37.8