There's #6 on the bench, and 6 bottles to the right of him. There is one bottle next to him, and a one and a seven on the shirt by his right ear. One corresponds to the bottle on the left, seven is the total number of bottles on the bench. The one bottle on the bench plus the six on his shirt equals to the seven on the shirt by his ear.
And don't get me started on those numbers on the shirts on the left side!
