Listed here are product costs for the production of soccer balls. Classify each cost (a) as either variable (V) or fixed (F) and (b) as either direct (D) or indirect (I). What patterns do you see regarding the relation between costs classified in these two ways? b. Direct or Indirect Product Cost a. Variable or Fixed 1. Leather covers for soccer balls 2. Annual flat fee paid for office security. 3. Coolants for machinery.. 4. Wages of assembly workers. 5. Thread to hold leather together 6. Taxes on factory 7. Machinery depreciation (stralght-line) .**