Question 150907
Suppose he sold all medium-size drinks
That would be {{{1.15*40 = 46}}}dollars worth
and that's too much
Her's a chart to find # drinks that total $45.25:
 sm - med - lg - cost 
 1  --   39  --   0 --  45.85  (still too high)
 2  --   38  --   0 --  44.70  (now too small)
 2  --   38  --   1 --  46.00  (too high again)
 2  --   37  --   1 --  45.85  (close, but too high)
 3  --   37  --   0 --  45.55  (closer, but high)
 3  --   36  --   1 --  45.70  (higher still)
 4  --   36  --   0 --  45.40  (closest yet, a little high)
 4  --   35  --   0 --  44.25  (I need 1 more sm drink)
 5  --   35  --   0 --  45.25  Bingo
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5 small drinks and 35 med drinks were sold
Any other way that works is OK, too