How do you calculated the overhead allocation for Standard Boxes? what's the math behind the result of: Depreciation: $3.78 million (portion of fixed cost for Standard Boxes) Maintenance: $5.00 million (portion of fixed cost for Standard Boxes) Purchase order processing: $0.90 million (portion of fixed cost for Standard Boxes) Inspection: $4.86 million (portion of fixed cost for Standard Boxes) Indirect Materials: $7.00 million (portion of fixed cost for Standard Boxes) Supervision: $3.60 million (portion of fixed cost for Standard Boxes) Supplies: $16.84 million