Answer:
first machine would cost $420
and the second machine would cost $432
Joanne, you should buy the first machine
Step-by-step explanation:
If you get a 30% discount, then you are paying 70% of the selling price.
Machine 1: 600(.70) = 420
Machine 2: A 10% discount means you pay 90%
600(.90) = 540 But now you get a 20% discount on that amount, which means you would pay 80%
So, 540(.80) = 432
Therefore, the first machine would cost $420
and the second machine would cost $432
Joanne, you should buy the first machine