Exchange 2013 DR Bandiwth calculator

Hi Team,

I had question, I want to deploy Exchange 2013 DR DAG, and I have to calculate WAN bandwith requirement from HQ to DR

for example this case, I have 4 database, total that 4 database generate 10.000 log per day (1mb size per log)

how much bandwith I have to provide ? for this example requirement

I hope you can give me basic formula :)

Thanks