# math plzzzzzzz help

posted by
**kim**
.

this is grade 10 math questions

a rectangular window is 5 feet 3 inches in length, and 3 feet 6 inches in width. if the perimeter of the window must have caulking that costs 32cents per inch, how much will the caulking cost??

the answer is $67.20

but i got 846.73 :(

what i did was

5ft=60inch legth= 60 + 3 = 63inches

and for the width

3ft=36inches width= 36 +6 = 42inches

42 x 63 =2646

2646 x 0.32= 846.72

plzz tell me what i did wrong