How do you beat level 7 in The Warehouse game?

Push the boxes all left 1 space, then all right 1 space to get the one at right to the target area, and be sure to put it at the FAR LEFT yellow space! Repeat the process, and now you have to push the boxes *down one* when you are at the far side, which lets you get the next box over to the right (second yellow spot). Repeat the process, in each case moving boxes only to the two "middle squares" in each of the four horizontal lines.

(see discussion)