As the manager of Speedy Supermarket, answer the following questions. (Round dollars to the nearest cent and percents to the nearest tenth of a percent.) Speedy Supermarket 4/$5 2 Liter Bubbly-Cola Products SALE $13/3 12 Pack Bubbly-Cola Products (a) If 2 liter Bubbly-Cola products cost Speedy $16.20 per case of 24 bottles, what is the amount of the markup (in $) and what is the percent markup on selling price per case? amount of the markup percent markup on selling price (b) If 12 pack Bubbly-Cola products have a markup of $8.65 per case of six 12 packs at Speedy, what are the cost (in $) and the percent markup on selling price per case? cost $ percent markup on selling price