I have two conditions I need to sum on 2 different worksheets:

Worksheet1
Column A2
John Doe

Worksheet2
Column A2 Column B2 Column C2
John Doe 1 2
John Smith 2

I need to:
If A2:A100 in Worksheet2 = columnA in Worksheet1
and
column B in Worksheet2 <1
Sum up Column C in worksheet1 in B2, otherwise 0

So in this instance B2: John Doe would be 0, but John Smith would be 2.

I hope I haven't made it too confusing. Please help.

Thanks.