Felix's Fantastic Donuts has some bench space in the shop that can be used to sell drinks. However they can only sell one of these products - and must evaluate which one should be sold.

	Milk shakes	Bubble tea
Projected sales (units)	350	600
Sales price per unit	$5.50	$8.00
Direct materials per unit	$2	$4
Direct labour per unit	$1	$1
Packaging per unit	$1	$1.50
Fixed overhead for machines	$250	$450

Enter the total contribution margin for the product that the business should choose to sell.