Total internet data used within a specific time period

Hi Team,

I am trying to get a dashboard tile that displays the total internet usage over a 24-hour period. I am using CheckMK cloud integration to try and accomplish this.

I have calculated the total BPS over that 24 hour period i just need to convert BPS to Gigabytes but grafana is showing Tib/s. I have selected Bits/s in the data field.

I just need some help converting the metrics to the correct format.