math
posted by jen .
• regular rate: $2.10/lb
• ship 101 to 500 lb, get a 20% discount
• ship over 500 lb, get a 40% discount
A large medical supply company has promised to donate 12 hospital beds and 4 wheeled stretchers over four months. Each bed weighs 58 kg and each stretcher weighs 90 lb.
a) How much will it cost total if she ships a quarter of the equipment (three beds and one stretcher) each month?
b) How much will it cost total if she ships half the equipment every two months?
thanks!

math 
Henry
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