Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
Jack is on the phone with a scammer who says the IRS will arrest Jack if he doesn't send them the codes from 6 $500 Best Buy gift cards and 9 $200 Walmart gift cards. After sending the codes for 1 Best Buy gift card and 2 Walmart gift cards, Jack wises up and hangs up. How many dollars' worth of gift cards can he still return?

### Response:
First find the number of Best Buy gift cards Jack needs to return: 6 cards - 1 cards = <<6-1=5>>5 cards
Then multiply that number by the cost per card to find how much Jack spent on Best Buy gift cards: 5 cards * $500/card = $<<5*500=2500>>2500
Then find the number of Walmart gift cards Jack needs to return: 9 cards - 2 cards = <<9-2=7>>7 cards
Then multiply that number by the cost per card to find how much Jack spent on Walmart gift cards: 7 cards * $200/card = $<<7*200=1400>>1400
Then add the two amounts of money Jack spent to find the total amount he needs to return: $2500 + $1400 = $<<2500+1400=3900>>3900
#### 3900