Answer:
She will have to pay $900 when she withdraws the entire $6000.
Explanation:
Given
Victoria deposited money= $3000
At her retirement
Victoria's money grow=$6000
Victoria is currently in bracket=15%
Now,to find the 15% of $6000

Because 15% means

15% of $ 6000=

15% 0f $ 6000= $900
Therefore, when she withdraws the entire amount $6000 then she will have to pay= $900