Ineed with 36 i tired to show work i’m still confused

1st you need to change the percentage to a decimal
--> 60% would turn into 0.60
next you would multiply the 0.60 and the 65$
this will give you the markup price which would be 39$
lastly you add the 39$ to the original 65$ and that will give you the ending price for one camera which is -->$104

hope this helps!

The answer would be b ! explanation: the formula for sa *surface area * is 2×l×w+2×l×h+2×w×h so in this case l=4w=12h=8so you use the formula to solve it and it give you the answer of 352^cm^2