Combining values from multiple lists

Hello,
So I have about 6 two-column lists: policy number and a monetary value. I need to combine all of the values of the same policy number to see if they add up to 0 or not. The issue is that there are certain policy numbers that aren't in one list but are in another, and that there are duplicates within each list.

Here are small sample of a couple lists
List 1:
1387 215.54
1392 -28
1392 76
1465 -0.36
1465 0.36
1703 -95.04
1703 95.04
1822 -10
1822 116
2906 80.61
2940 87.78
3183 54.48
3227 0
3440 76.97

List 2:
1193 -123.2
1202 -127.1
1387 -99.14
1387 -116.4
1392 -48
1822 -106
2906 -80.61
2940 -87.78
3183 -54.48
3440 -76.97
3907 -110.31
3942 -132.98

Thanks for any ideas/help

AlKey,
As soon as I posted this I found out about the data consolidation, and then I went on to use VLOOKUP to add the two columns together after I got rid of the duplicates. Your solution is so much easier hahaha.
Thanks