please help can not seem to get the correct answer

Save & Exit Subm Check my work Problem 2-23 (Algo) A fast-food restaurant serves hamburgers, cheeseburgers, and chicken sandwiches. The restaurant counts a cheeseburger as equivalent to 1.31 hamburgers and chicken sandwiches as 0.89 hamburger. Current employment is four full-time employees who each work a 40-hour week. a. If the restaurant sold 650 hamburgers, 850 cheeseburgers, and 450 chicken sandwiches in one week, what is its productivity? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Productivity hamburger equiv per labor hr b. What would its productivity have been if it had sold the same number of sandwiches (1,950), but the mix was 650 of each type? (D. not round intermediate calculations. Round your answer to 2 decimal places.) Productivity hamburger equiv per labor hr