A crafts store offers a $5 store credit for filling out a new card membership. The store manager expects to get 200 new memberships this month. The manager calculates that for every $1 increase, n, in the store credit, there will be 15 additional memberships for the month. The manager plans to pay out $5,350 in store credit this month. Which equation can be used to calculate the number of $1 increases in store credit?