Answer:
181.75 in2 (inches squared)
Explanation:
Surface area is all the areas of the sides added up. in this case, it would be calculated as follows:
2×8×2.5 = 2 long sides of box = 40
2×6.75×2.5 = 2 short sides of box = 33.75
2×6.75×8 = 2 faces of box = 108
40 + 33.75 + 108 = 181.75