37. The salary of the supervisor of a single assembly line of a factory will generally be classified as a cost: (a) variable and direct. (b) variable and indirect. (c) fixed and direct. (d) fixed and indirect. 38. Curry operates at breakeven when he sells 90,000 units. The company plans to sell 96,000 units. Which of the following would represent your safety margin? (a) 96,000 units (b) 10% of current units (c) 90,000 units (d) 6,000 units