20 Software bug were given a bounty and assigned to a software developer. For each bug resolution, the software developer was promised $10000. However, for every bug reported in his resolution, it was decided that he would have to give back $5000.
To win maximum bounty amount, the software developer gave resolution to all the 20 bugs. As a result, he got some bug reported in his resolution and got finally got $125000 at the end of the evaluation.

Can you calculate how many bugs were reported back in the resolutions?