Problem: Cal Cul makes two types of calculators - scientific and financial. The scientific cost about twice the price of the financial. The statistics are as follows:
                   Sales price   	Cost price/unit    	Units sold
Scientific          	$70                 $40               	25,000
Financial            	40                   25               	50,000
The fixed costs for the company are $50,000.
a)	What is the contribution margin for each type of calculator?
b)	What is the sales mix by sales volume and by unit?
c)	What is the weighted-average unit contribution?
d)	What is the break-even in sales? How much of each unit would be sold, assuming a constant sales mix?
e)	If the company wants to make 25,000 in profits, how much of each must they sell?