If on a tough week she sells half what she sells on a good week, then on a good week she sells 800*2 = <<800*2=1600>>1600 dollars.
If she had 5 good weeks, the amount is 5*1600 = <<5*1600=8000>>8000 dollars.
During the 3 tough weeks, she sells 3*800 = <<3*800=2400>>2400 dollars.
The total amount she sold in both weeks is 2400+8000 = <<2400+8000=10400>>10400 dollars.
#### 10400