Help please thank you

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?

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

Solve the given system of equations. 2y= -x+9 , 3x-6= -15