It all depends on the company. At my company, it is 75 hours of credit per month plus per diem 24/7 while in training. Also, single occupancy hotels are provided. So, you make quite a bit during training.

First year base pay is about $39/hr, so about $3000 base pay plus another $1200 per diem. That isn't bad for training pay.

Different companies have different pay structures for training.