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Question 1 0.9 pts Variable costs are costs that change per unit at every level of activity. True O False Question 2 0.9 pts If revenue per unit is $80 and variable cost is 30% of revenue, then contribution margin per unit is $56. True O False Question 3 0.9 pts If activity level increases 50% and a specific cost increases from $200,000 to $300,000, this cost would be classified as a mixed cost None of the above O variable cost O fixed cost. Question 4 0.9 pts If the fixed cost for a company is 50,000, the contribution margin ratio 40%, and actual sales are 140,000. What is the margin of safety in dollars? O $56,667 $15.000 $90,000 O $36,000 Question 5 0.9 pts if total fixed costs are $3,000,000 and variable costs as a percentage of unit selling price are 25%, then the break-even point in dollars is 0 $750,000 O $3,000,000 $12,000,000 O $4,000,000