As a seller of hashing power, i.e. miner, you get paid in bitcoins. The amount depends on the hashing power that you forward to NiceHash. If you want to check how much your hardware can earn for you in a day or a month, we suggest that you check the profitability calculator. If your hardware isn't listed there, you can simply check your potential earnings by downloading and running NiceHash Miner.
Please note that earnings are expressed in bitcoins and that the fiat currencies are calculated under the exchange rate that can vary from hour to hour and are there only for informational purposes.