Hi experts

Please solve this plane sample with formula

A B C .............................. H I
1 . . . ..............................10 1
2 10 . 1 ............................. 10 2
3 . . . ..............................10 3
4 . 10 2 .............................N/A N/A
5 . . .
6 . 10 3
7 . . .
insted of N/A in last vlookup replace blank
Thanks in advance