A manufacturer of motor oil has a trade discount policy wherby the manufacturer's suggested retail price is $30 per case with the terms of 40/20/10. The first number in the percentage sequence always refers to the retail end of the channel, and the last number always refer to the wholesaler or jobbers closest to the manufacture in the channel. The manufacturer sells its products though rack jobber, who sell to wholesalers, who sell to gas stations. What will the manufacturer's sale price be?