The number of CDs selling at $10 each at the store is 40/100*200 = <<40/100*200=80>>80
This means the store sells 200-80 = <<200-80=120>>120 CDs at $5 each.
Prince bought 1/2*80 = <<1/2*80=40>>40 of the CDs selling at $10 each.
The total amount of money Prince paid for the 40 CDs selling at $10 each is $40*10 = $<<40*10=400>>400
If he bought all the CDs selling at $5 each, he paid a total of $5*120 = $<<5*120=600>>600
For all the CDs he bought, Prince spent $600+$400= $<<600+400=1000>>1000
#### 1000