John Boyd Corporation manufactures and sells 1,000 tractors each month. The primary component in each tractor is the motor. John Boyd has the monthly capacity to produce 1,300 motors. The variable costs associated with manufacturing each motor are shown below: Variable manufacturing overhead \\( \\$ 30 \\) Fixed manufacturing overhead per month (for up to 1,300 units of production) averages \\( \\$ 28,000 \\). Joan Reid, Incorporated has offered to purchase 210 motors from John Boyd per month to be used in its own outboard motors. If Joan Reid's order is rejected, what will be John Boyd's average unit cost of manufacturing each motor? \\( \\$ 42 \\) per unit Some other amount \\( \\$ 100 \\) per unit \\( \\$ 72 \\) per unit