This is a great review for rates and unit price. Hang the posters around your room and have your students start at any problem (no traffic jams!) If they solve it correctly, they will find the answer on another poster. And if they can't find the answer, they need to go back and check over their work.
This is aligned with 6th grade common core standards RP A2 and 3.
It could easily be a fun way to review rates and unit price for 7th graders (before the fractions are added in to the mix!)