1) Start by adding up the total number of money made from sales. Note that the units are in thousands of dollars: 18 (steak) + 14 (chicken) + 5 (salad) + 12 (vegetarian) + 20 (sandwiches) = 69 thousand dollars in sales total
You can eliminate the bottom right answer choice. Assume that all the other locations, being the same size, made the same amount in sales. 69,000 times 3, for each location, is 207,000. That is less than 250,000.
2) Now you need to eliminate two of the remaining three choices. Let's test the top left one first. Did salads make up 14% of the restaurant's total sales? 14% of 69,000 = 0.14(69,000) = $9,660.
Salads made about $5,000 total, so the top left choice is wrong.
3) Eliminate one of the remaining two choices. Let's test the bottom left one. Did sandwiches make up 1/5 of the total sales? 1/5 of 69,000 = 0.2(69,000) = $13800
Sandwiches made about $20,000 total, so the bottom left choice is wrong.
4) Confirm that the top right choice is correct. If salads made $5,000 at this store, and all the other stores also made the same, then the total salad sales would be: $5,000*3 = $15,000
