In: Accounting
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 Due to erratic sales of its sole product—a high-capacity battery for laptop computers—PEM, Inc., has been experiencing difficulty for some time. The company’s contribution format income statement for the most recent month is given below:  | 
| Sales (12,900 units × $20 per unit) | $ | 258,000 | 
| Variable expenses | 129,000 | |
| Contribution margin | 129,000 | |
| Fixed expenses | 144,000 | |
| Net operating loss | $ | (15,000) | 
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 Refer to the original data. The Marketing Department thinks that a fancy new package for the laptop computer battery would help sales. The new package would increase packaging costs by $0.50 cents per unit. Assuming no other changes, how many units would have to be sold each month to earn a profit of $4,200? (Do not round intermediate calculations and round your final answer to the nearest whole number.) 
 
 
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