What is the least amount of fabric needed to make the tent

The bottom lateral side has area of 6*7 = 42 square feet
The two lateral sides facing up at a slant have area of 5*7 = 35 sq ft each
So the total lateral surface area is: 42+35+35 = 112 square feet

The front and back base faces of the prism have area of 6*4/2 = 24/2 = 12 sq ft
The total base area is 2*12 = 24 sq ft

Overall, the total surface area of this entire prism is 24+112 = 136 sq ft
which is the minimum amount of material needed

136 square feet

I’m not absolutely sure but i think it’s 7x6x5x4x3x2=5040 because as the first character you can take any of the 7 given then you are left with 5 then 6 then 4 etc.