Final answer:
The total area that was wrapped is 502 square inches.
Step-by-step explanation:
To calculate the total area of the box, we need to find the surface area of all six sides.
The formula for the surface area of a rectangular prism is:
Surface Area = 2 * (length * width + length * height + width * height)
Plugging in the given measurements:
Surface Area = 2 * (18 * 7 + 18 * 5 + 7 * 5)
= 2 * (126 + 90 + 35)
= 2 * 251
= 502 in²
So, the total area that was wrapped without any overlap is 502 square inches.