Solve the problem.The manager of a bulk foods establishment sells a trail mix for $7 per pound and premium cashews for $15 per pound. The manager wishes to make a 720-pound 
mixture that will sell for $8 per pound. How many pounds of each should be used?
A. 630 lb of trail mix
90 lb of cashews
B. 90 lb of trail mix
630 lb of cashews
C. 360 lb of trail mix
360 lb of cashews
D. 405 lb of trail mix
315 lb of cashews
Answer: A
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