Network Utilization Calculation?

Hi all,
There was a testing on the software for network utilization. Below is the results:

File Size: 380k = 10118bps = 2.2 kbits per sec
File Size: 1M = 32143 = 4
File Size: 1.5m = 44868 = 5.5k
File Size: 2M = 58826 = 7.2
File Size: 5M = 143834 = 17.6

As a beginner to network, am not really understand what these data mean, can anyone help with this? Thanks.