Denny owns a restaurant that sells lunch for $15. The food cost of sales used in producing each set lunch is $5. Additional variable costs are $5 per lunch. What is the contribution margin expressed in dollars and percent for selling 155 lunches? Question 9 options: $5 and 33.3% $775 and 33.3% The answer is not listed $75 and 33.3% $705 and 33.3%