Pleas help me on this problem you have to do both because it is 2 questions for one problem

Given:
The cost price of the deck of cards is $72.78 dollars.
Mark up percent is 5%.
a) To find the amount of mark up:
So, we can write it as,
[tex]\begin{gathered} 5\text{ \% of 72.78=}\frac{5}{100}\times72.78 \\ =\text{ \$}3.639 \end{gathered}[/tex]Thus, the amount of mark-up is $3.64 (rounded to the nearest hundredth).
b) To find the new price:
The new price = Cost price + Amount of mark up
So, we get,
[tex]\begin{gathered} =72.78+3.64 \\ =76.42 \end{gathered}[/tex]Thus, the new price is $76.42.