Math In Restaurants Worksheet With Answers Page 5
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11Answer Key
Math in Restaurants: Take the challenge
• Use rate of change of .80 per month, so adding up the costs for 14 months= 883.8. Then…
o Divide by 14 to get average 883.8 /14 = $63.13 per case (of 48 avocados).
o $63.13 / 48 avocados = $1.32 (average cost of one avocado).
o $1.32 + .40 = 1.72 (total cost of ingredients)
o Rule of thumb: Multiply by 4: 1.72 x 4 =$6.88 or about $7.00 (menu price).
Or
• Use $64 (representing the as highest cost, not the average).
o 64 /48 avocados in a case = $1.33 (average cost of one avocado)
o $1.33+ .40 = 1.73 (total cost of ingredients).
o Rule of thumb: 1.73 x 4 = $6.92 or about $7.00 (menu price).
Using Strategy B:
• Use $57.03 or the average cost from the 48 month period: 57.03/48 = 1.19. Add ingredients +
.40 =1.59. Rule of thumb: 1.59 x 4 = $6.36 or about $6.50.
Or
• A final option would be to round all the way up to $7.00.
Your solution: (Round your answer to the nearest dollar or half-dollar.)
My recommended menu price for guacamole next year is: ___________________
Depending on average cost predicted, $6.00, 6.50, $7.00, $7.50, or $8.00 might be reasonable
choices.
4. Imagine that you now have to recommend a menu price for another dish for next year,
based on the cost of the main ingredient over the past few years and Sue’s Rule of
Thumb. If you were going to email Chef Sue Torres to explain your strategy for
determining the price, what would you tell her? Answers may vary.
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