Fox formula. copy from one characteristic to another

Hello.

BW 3.5.

We've got multi-planning area, that includes 2 planning areas, that have different characteristics. I want to copy data from one planning area to another matching values of one characteristic to another. Could i make it using fox formula? If yes,could you explain how? I tried several ways, but didn't succeed

Example,

Planning area 1(InfoOblect1,Amount)

1, 100

2, 300

Planning area 2(InfoOblect2,Amount)

and we know match

InfoOblect1 , InfoObject2

1 101

2 202

And i want to get data in Planning area 2

InfoOblect2,Amount

101 ,100

202 ,300

Thanks for your help