is this right ?

Stamburgers sols three cheeseburgers for every two regular hamburgers. A chooseburger sells for $6.00 with a variable cost of $2.25 A regular hamburger ses for 14.75 with a varie cost of $1.25. What is the weed average contribution margin Pound the final to the nearest cont.) SA 5305 OB 515.25 OC. $244 OD. 51.56