The Coffee Shoppe sells a coffee blend made from two coffees, one costing $3.00/lb and the other costing $2.00/lb. If the blended coffee sells for $2.80/lb, find how much of each coffee is used to obtain the desired blend. (Assume the weight of the blended coffee is 100 lb.)
__________ lb of $3.00/lb coffee
__________ lb of $2.00/lb coffee
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