JC Penney of Boston Sold Office Equipment for $12,000 to Lee's

J.C. Penney of Boston sold office equipment for $12,000 to Lee's of San Diego. Terms of the sale are 3/10, n/30 FOB Boston. J.C. Penney has agreed to prepay freight $300. Assuming Lee's pays within the discount period, how much will Lee's pay J.C. Penney?

A) $11,640
B) $8,544
C) $8,644
D) $11,940
E) None of these