
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Square corners, each 8 units on a side, are removed from a $25$ unit by $40$ unit rectangular sheet of cardboard. The sides are then folded up to form an open box. Determine the surface area, in square units, of the interior of the box.
A) 700 square units
B) 744 square units
C) 750 square units
D) 800 square units

Present the answer in LaTex format: \boxed{Your answer}
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