Solution:
Given that,
Price of telescope = $ 400
Mark up = 32 %
To find: Cost after mark up
The formula used is:
Therefore,
Cost after mark up = 400 + 32 % of 400
[tex]\text{Cost after mark up } = 400 + \frac{32}{100} \times 400\\\\\text{Cost after mark up } = 400 + 0.32 \times 400\\\\\text{Cost after mark up } = 400 + 128\\\\\text{Cost after mark up } = 528[/tex]
Thus cost after mark up is $ 528 and expression is 400 + 400 (0.32 )