A. Cost of disposal of hazardous waste materials to a chemical plant.

B.Amounts paid by a mobie home manufacturer to a subcontractor who installs plumbing in each mobile home.

C. Depreciation on sales showroom fixtures.

D. Salaries of security guards in an administrative office building.

E. Salaries of factory security guards.

F. Salaries of office workers in the credit department.

G. Depreciation on the raw matierals warehouse.

H. Income taxes on a profitable manufacturing company.