Jan has a gift box that occupies a space of cubic feet.
The shipping container has cubic feet of space.
The difference between the shipping crate's volume and the gift box is cubic inches.
Looks like she'll need 6 bags if each bag contains 1 cubic foot and we're filling even with the top of the shipping box.
So the peanut depth is foot or 3 inches.
which is of a foot higher. Counting the other foot along with this we are now at feet deep or about 9.9 inches.
That is clearly over the top of the 12 inch gift box.
Now, this was a lot of arithmetic, and there may be errors. Check it over to see if it sounds logical to you. Maybe one of the other MHF helpers will check my work. Good luck.