Carter Co. sells two products, Arks and Bins. Last year, Carter sold 14,000 units of Arks and 56,000 units of Bins. Related data are:

Product	Unit Selling Price	Unit Variable Cost	Unit Contribution Margin
Arks	$120	$80	$40
Bins	80	60	20

What was Carter Co.'s sales mix last year?

a.40% Arks, 20% Bins

b.12% Arks, 28% Bins

c.70% Arks, 30% Bins

d.20% Arks, 80% Bins