What is the total surface area of the rectangular pyramid below.? (The net of the figure is also given to help if needed)

A rectangular pyramid. The rectangular base has a length of 18 feet and width of 10 feet. 2 triangular sides have a base of 18 feet and height of 14.1 feet. 2 triangular sides have a base of 10 feet and height of 16 feet.

a
386.9 square feet
b
593.8 square feet

c
639.4 square feet

d
1,053.2 square feet