6. Rhonda runs a small street vendor service that contracts to produce and sell moulded plastic souvenirs (key chains, commemorative plastic coins, plastic animals, etc.) at small fairs. As owner of the firm, Rhonda must decide how much of each product to produce. What is a key element of this decision? a. how costs will vary as she changes the level of production b. the cost of bookkeeping services c. the fixed cost of production d. the cost of his vending booth 6. Rhonda runs a small street vendor service that contracts to produce and sell moulded plastic souvenirs (key chains, commemorative plastic coins, plastic animals, etc.) at small fairs. As owner of the firm, Rhonda must decide how much of each product to produce. What is a key element of this decision? a. how costs will vary as she changes the level of production b. the cost of bookkeeping services c. the fixed cost of production d. the cost of his vending booth