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18. Business A coffee shop needs two types of beans to blend their coffee. The first type of bean has a fixed cost of $40 per month and the second bean has a fixed cost of $20 per month. Every month, the total cost of the first type bean used is $350 at 50 pounds used and the total cost of the second type bean used is $245 at 45 pounds used. Find the cost equations for the two type of beans assuming they are linear