For a renovation project, on Nov 1st, RIBNA purchased on credit 1000 12-in 12-in Ceramic tiles for $2 per tile to be paid on Dec 15 th. With only 5% waste of the tiles used, RIBNA's professional tiler, whose installation fee is $12 per sq. ft., furnished 800 sq. ft. in five days and sent the tiling invoice to the owner on Nov 10th. According to the project contract, it takes one month for each invoice to be paid. Based on the above scenario, RIBNA's profit for the month of Nov is close to: $9280 $9700 $11680 $0 profit for Nov