One grocecy clerk can stock a shelf in 15 min, whereas a second clerk requires 30 min to stock the same shelf, how long would it take to stock the shelf if the two clerks worked .

You’re ordering more thread for blue jeans co. you usually purchase from ted’s threads, which sells 12 thread spools for $27. you recently received a notice from wade's wares that says you can buy thread from them for $2.30 each for the first 2 dozen and $2 a spool thereafter. you need to order 5 dozen spools. what percentage can you save by going with wade’s wares?