85 bikes, because since they are selling each bike for 110 and buying one costs 60, subtract those to get 50, then divide 4250 by 50 to get 85 bikes, which the number of bikes needed to be sold to break even.
The store needs to sell 38 bicycles because if u divide 4250 by 110 ( because the store charges 110 per bike). U should get 38.6363636 u must round to the nearest whole number. U should then get 39. If u multiply 39 by 110 u get 4290 that is how u check