PLEASE HELP FAST SHOW WORK PLZZ

1. Y varies directly as X. Find X when y=84 and k= 6

2. B varies directly as A.
Find K when a=65 and b=5

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?