The required maximum number of drinks that can be purchased for $75 is 85.
Given that,
For orders of 50 or fewer sports drinks, the price is $0.80 per drink, plus $10 shipping and handling. When more than 50 sports drinks are ordered, the price is $0.70 per drink, plus $15 shipping and handling.
Here,
Case 1
For orders of 50 or fewer sports drinks, the price is $0.80 per drink, plus $10 shipping and handling.
Number of sport drinks = 75 - 10 / 0.80 = 81 sports drinks
Case 2
When more than 50 sports drinks are ordered, the price is $0.70 per drink, plus $15 shipping and handling.
Number of sport drinks = 75 - 15 / 0.70 = 85 sport drinks
Thus, the required maximum number of drinks that can be purchased for $75 is 85.
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