9. Lesson 5 (Chapter 6) question and also use the formula for finding out the selling price if you know the cost and cost percentage (Lesson 1). Show the calculation below. Sunshine Restaurant has recently performed a butcher test for beef loin and found out that the cost of a usable ounce of beef loin steak is $.50. If standard portion size is 8 ounces, and the food cost percentage is 30%, how much should be the portion selling price