The formula to find the surface area of a right rectangular prism is SA = 2lw + 2lh + 2wh, where l is the length, w is the width, and h is the height.
In this case, all edge lengths measure 12.75, so we can plug this value into the formula:
SA = 2(12.75)(12.75) + 2(12.75)(12.75) + 2(12.75)(12.75) = 2(162.5625) + 2(162.5625) + 2(162.5625) = 325.125 + 325.125 + 325.125 = 975.375 cm^2
Therefore, the correct answer is (1) 975.38 cm^2.