Final answer:
The Building Maintenance costs at Aldo Industries, Inc. would be allocated over a total of 34,000 square feet, which is the combined square footage of the Machining and Assembly departments.
Step-by-step explanation:
The Building Maintenance costs at Aldo Industries, Inc. should be allocated over an area that includes the Machining and Assembly departments, but not the Building Maintenance department itself nor the Human Resources department, as typically service departments do not allocate costs to themselves. After excluding the square footage of the Human Resources and Building Maintenance departments, we are left with the Machining and Assembly departments to allocate the Building Maintenance costs to.
Machining department's square footage: 8,000
Assembly department's square footage: 26,000
Thus, the total square footage for allocation of Building Maintenance costs is the sum of Machining and Assembly departments' square footage:
8,000 square feet (Machining) + 26,000 square feet (Assembly) = 34,000 square feet
Therefore, the Building Maintenance cost should be allocated over 34,000 square feet.