Need to find the perimeter in feet...

The width is 35ft and 5in
The length is 10ft and 3in
Need to write the answer in feet... If there is anybody that can point me in the right direction..
I know I have to convert in. into feet..
and 12in= 1 foot

P = 2L + 2W

P = 2(35'5") + 2(10'3")

P = 70'10" + 20'6"

P = 90' 16"

P = 91' 4"