TechPro offers instructional courses in e-commerce website design. The company holds classes in a building that it owns. Identify each of TechPro's costs below as (a) variable or fixed and (b) direct or indirect by selecting the appropriate dropdowns. Assume the cost object is an individual class. Variable or Fixed Direct or indirect 1 2 3 Depreciation on computers used for classes Instructional manuals for students Travel expenses for salesperson Depreciation on classroom building Advertising Instructor wage (per class) 4 5 6