Glass Doctor Company manufactures sunglasses. Following is a list of costs the company incurred during May. Use the list to calculate the total manufacturing overhead costs for the month. $116 Glue for frames Depreciation on company cars used by sales force 3,435 5,412 Plant depreciation Interest Expense 1,638 46,694 21,431 Lenses Company president's salary Plant foreman's salary Plant janitor's wages Oil for manufacturing equipment 3,525 1,168 $145