12) \"Rajiv's Coffees\" sells Its coffees for average $2.50 per coffee. The average variable cost of making each coffee is $1.20 per coffee. The monthly fixed cost of the business is $6,136. a. How much should Rajiv's monthly sales be to make operating income of $15,340? Recently, the suppliers of coffee beans have increased their prices by 10%. Therefore, the variable cost of making ._ each coffee will increase by 10% for "Rajiv's coffees". ' _. b. If Rajiv does not want to increase the price of his coffees, how many more coffees should he sell in a month to maintain his monthly operating income at $7670? 3' ' c. If Rajiv knows that he cannot increase his sales units, and he decide to increase the price of each coffee, by what percentage should he increase the price of each coffee to maintain his operating income at $7,670