Kb = kilobyte, which means 1000 * byte, so 124 kb = 124 * 1000 = 124,000 bytes

and similarly Mb = 1,000,000 Bytes, 124 Kb = 124,000 bytes.

Mbps = Mb per second, so 1,000,000 bytes per second. So 33 Mbps is 33, 000, 000 bytes per second.

you should be able to calculate this out yourself from this point.