Ineed to know how to solve 6=5=4=11

How do i do this activity, is appreciated

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.