It would be 16.5 inches long.
First you have to divide 11 by 8 (1.375) to get how long would the letter be if it was 1 inch wide. Then multiply 1.375 by 12 which is 16.5.
The number in the photo should be the answer but the problem might just be that your question was worded incorrectly.
A-
-$12.58
B-
-$37.58
C-
You need $37.58 to bring it back up to $0
5 sig figs is the correct answer