The Consumer Electronics Show (CES) reports that the HP Specter laptop computer starts at $999.99 for a

Question:

The Consumer Electronics Show (CES) reports that the HP Specter laptop computer starts at $999.99 for a base configuration. The model displayed at its recent show costs $1,399, $100 more than the comparable 13-inch Apple Mac Book Air. If Computers-R-Us buys the HP Specter at the show with 3/15, net 30 terms on August 22, how much does it need to pay on September 5?