The total surface area \( A \) of a cube can be calculated using the formula:
\[ A = 6s^2 \]
where \( s \) is the side length of the cube.
Given the side length \( s = 5 \) inches, we can substitute this value into the formula:
\[ A = 6(5^2) = 6(25) = 150 , \text{in}^2 \]
Therefore, the total surface area of the cube is 150 in².