Given:
Wholesale price = $5
They sell them after a markup of 75%.
To find:
The amount of mark up and the retail price.
Solution:
We have,
Wholesale price = $5
Markup% = 75%
![Markup=5* (75)/(100)](https://img.qammunity.org/2021/formulas/mathematics/high-school/xnjsga7bqzgbverc1xwwvoo0b6ko83yi3p.png)
![Markup=5* 0.75](https://img.qammunity.org/2021/formulas/mathematics/high-school/8aji47hbygyd544gzmtfrcgwddqeal5pp0.png)
![Markup=3.75](https://img.qammunity.org/2021/formulas/mathematics/high-school/580iy29mzmwfvc05qgmtn4wzrhzye02k5t.png)
Now,
Retail price = Wholesale price + Markup
![\text{Retail price}=5+3.75](https://img.qammunity.org/2021/formulas/mathematics/high-school/nqx3soes0aum3e4jw1mxmb73hb7f0q4vzo.png)
![\text{Retail price}=8.75](https://img.qammunity.org/2021/formulas/mathematics/high-school/n9kuz6hmptm37juuqdhg5hgdwme3i5or19.png)
Therefore, the markup price is $3.75 and retail price is $8.75.