Green Woods sells speciality equipment for mountain climbers. It's sales for last year included $387000 of tents and $718000 of climbing gear. For the next year management decided to sell sleeping bags. As a result of this change sales projections for the next year are $411000 of tents $806000 of climbing gear and $128000 of sleeping bags. How much of next year's sales are derived from the side effects of adding the new product to its sale offerings?
A. $112000
B. 0
C. 128000
D. 240000
E. 251000