The correct answer to this question is that you have $1,000 available to spend in your account today, and will have a total of $3,000 to spend in six days.
Uncollected funds is money that you have deposited into your account, but that you cannot access yet. The bank has placed a hold on the money for a specific period of time. This is normally done when you deposit a check, because your bank wants to make sure that the money from the check clears the other account before you withdraw it.