Answer:
$324.35
Step-by-step explanation:
Given a $249.50 cell phone with a 30% markup, to determine the selling price of the cell phone we need to first calculate 30% of $249.50 as seen below;
![(30)/(100)*249.5=0.3*249.5=74.85](https://img.qammunity.org/2023/formulas/mathematics/college/4tl5g2cubykw72xafyx05tuqiyhw2l4ytp.png)
We'll now add $74.85 to $249.50 to finally get the selling price of the cell phone;
![74.85+249.5=324.35](https://img.qammunity.org/2023/formulas/mathematics/college/651pzvz3vc2pkhg4jy95p9x53fh5dfxhhs.png)
Therefore, the selling price of the cell phone is $324.35.