Refer to the following above what in the contribution margin ratio of? 65% 80% 72% 20% Refer to the information above. How many units must each month to earn a monthly operating income of $8,000? (Round your final answer to the next whole number.) 971 units 1, 442 units. 122, 500 units. 35.3 units. Multiple Choice Defficulty, 2 Medium MC Qu, 49 Refer to the information above. How many- Learning Objective; 20.O5 Determine the sales volume required to earn a designed leveled of operating income. When variable costs, the cost per unit values with changes in volume. True False