Try to understand the backend of Throughput.
Throughput says in 1 sec how much bits we are sending from the node, unit in this term will be bits/sec.
Given, 12000 frames are sending in 60 sec. And each frame size is 10000 bits.
In 1 sec. ----------200 frames are sent.
Here throughput = 200frames/sec.
In 1 sec ----200*10000 bits we are sending .
1 sec -----2x10^7 bits/sec.
That is throughput=2x10^7 bits/sec.