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'r'aver, Inc.\" has been manufacturing 5000 units per month of part 10541, which is used in the manufacture of one of its products. At this level of production, the cost per unit of manufacturing part 10541 is as follows: Direct materials $3 Direct labour 1 1 1|v'ariable overhead 4 Fixed overhead applied 5 $ Brown Company has offered to sell \"favor 5,000 units of part 10541 for $22 a unit. 'faver has determined that it could use the facilities presently used to manufacture part 10541 to manufacture product RAE, which would generate an additional contribution margin per month of $15J000. \"faver has also determined that one third of the xed overhead applied will be saved if part 10541 is purchased from Brown and product RAE is made. Calculate the cost to buy and the cost to make and the net advantagefdisadvantage of buying the part externally