ID repeat names and base calcs on those names

Hello.

So.... I have this recurring paypal transactions. Each month I get a report.

I want to know who donated more than, let's say, $100.

But many donate $5 each month.

So I want Excel to tell me ----- hey, yeah I recognize this guy, he is the same guy from last month (and the month before), and even though he just donates $5 at a time, his TOTAL is more than $100, so here is his info.

Is this possible?

Thanks so much!