A company sells three very different goods: A, B and C. Find below the quantities sold in the last period, with their respective average prices and variable costs: # of units Product A Product B 3,500 2,800 Product C 700 selling price per unit cost per unit $ 15 $ 9 $ 80 $ 40 $ 60 $ 48 REQUIRED: Calculate the percentage contribution margin for the company. Knowing that residual fixed costs are $93,700, what is the actual percentage margin of safety for the company? How much is the sales revenue of one bundle of goods (knowing that last period's sales are representative of the composition of the bundle)? How many units of the three goods do you have to sell in order to cover an incremental investment in advertising expense of $18,000?