Sales (13,000 units $40 per unit)	$	520,000
Variable expenses		260,000
		---------------------
Contribution margin		260,000
Fixed expenses		290,000
		---------------------
Net operating loss	$	(30,000)

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 $4,700? (Do not round intermediate calculations and round your final answer to the nearest whole number.)

Sales units ??