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Pay all off (to cancel out interest charges). Then in the future, only allow 1 card to report a small balance (like $20-$50), but pay it off by the due date to keep any interest from accruing.
Having 1 account report a small balance will help your FICO overall. Rotate the use of cards and have a different card report the single balance every couple months so that they all get use and don't get CLD or closed for inactivity.
Be sure that when you have the cards paid off, that you continue to pay the $500 weekly difference into savings and emergency funds. Make sure you have at least 3 months emergency, but better off having 6 months. Then put the rest into retirement and savings toward future major purchases (auto, auto maint, vacation, etc.).