Answer:
ok ok! i got you! =D
300+60 +8 = 368 so 300+60+8 matches with the first box
3,000+600+80 = 3,680 so 3,000+600+80 matches with the second box
30,000+600+80= 30,680 so 30,000+600+80 matches with the third box
that's it!
have a good day!
