[The Following Information Applies to the Questions Displayed Below

[The following information applies to the questions displayed below.]
Grand Gimmicks Company produces a single product with a current selling price of $170.Variable costs are $130 per unit,and fixed costs per month average $6,240.Management is considering increasing the selling price to $190 per unit.Assume that the variable cost per unit of the product and monthly fixed expenses will not change as a result of the proposed increase in selling price.
-At the proposed increased selling price of $190 per unit,the contribution margin ratio is closest to:

A) 60.2%.
B) 31.6%.
C) 68.4%.
D) 50.8%.