How to add values from sheet 1 and present total amount on sheet 2?

How to add values from sheet 1 and present total amount on sheet 2?

Consider the following two sheets in the same Excel workbook:
Expenses
A B
1 report amount
2 0402 10.00
3 0402 15.00
4 0402 5.00
5 1156 40.00
6 1156 30.00
Payouts
A B
1 report total
2 0402 30.00
3 1156 70.00
I'm looking for the formula for cells Payouts!B2 and further down. As can
be seen, these cells should just add up the expenses from sheet 1. I have
tried for Payouts!B2
=VLOOKUP(A2, 'Expenses'!A1:B6, 'Expenses!'2, FALSE);
But this keeps returning the "there is an error" popup without any further
information. What am I doing wrong? Any help is greatly appreciated :-)