3. An automotive service shop sold $600,000 worth of tires last year. The cost complement for tires and accessories is 0.75. The demand for last year is given as follows:

January has $60,000 tire sales. February has $40,000. March has $60,000. April has $48,750. May has $48,750. June has $51,000. July has $47,500. August has $40,000. September has $47,500. October has $45,000. November has $49,000. December has $62,500.

A.) Given the above sales for last year, calculate the index in the forecast for this year if the retailer expects a 4% increase over last year.

B.) Given this year's December forecast sales and planned reductions of $10,500; along with planned inventory for December 1st is $40,000 and for December 31st is $50,000. As of November 15th, the retailer has ordered $20,000 (@cost) worth of tires for December delivery. What is the open to buy (@cost) for the rest of the month of December?