King City Bikes (KCB) produces bicycles. Costs to manufacture and market the bicycles at last year's volume level of 2,000 bicycles per month are shown in the following table: Variable manufacturing per unit $221 Fixed manufacturing per month $242,000 Variable nonmanufacturing per unit $69 Fixed nonmanufacturing per month $290,000 KCB expects to produce and sell 2,350 bicycles per month in the coming year. The bicycles sell for $640 each. An outside contractor makes an offer to assemble KCB's bicycles and ship them directly to KCB's customers as orders are received from its sales force. It will charge KCB $165 per bicycle. KCB would provide the materials for each bicycle, but the outside contractor would assemble, box, and ship them. If KCB accepts the offer, its variable manufacturing costs would be reduced by 45%, and its variable nonmanufacturing costs would be cut by 55%. In addition, it would be able to save $12,100 of fixed manufacturing costs; fixed nonmanufacturing costs would be unchanged. KCB's marketing and production managers think that the idle resources could be used to produce and sell 90 racing bicycles, each with an estimated $550 contribution margin and no additional fixed costs. REQUIRED [Note: Round unit cost computations to two decimal places.] What is the difference in KCB's monthly costs between accepting the proposal and rejecting the proposal? (Note: If the costs of accepting the proposal are less than the costs of rejecting it, enter the difference as a positive number; if the accept costs are more than the reject costs, enter the difference as a negative number.)