conversations.from: human
conversations.value: A school is buying virus protection software to cover 50 devices.  One software package costs $40 and covers up to 5 devices. The other software package costs $60 and covers up to 10 devices.  How much money, in dollars, can the school save by buying the $60 software package instead of the $40 software package?
  Give me a detailed solution.
conversations.from: assistant
conversations.value: There are 50/5 = 10 sets of 5 devices in the school.
  So the school will pay a total of $40 x 10 = $400 for the $40 software package.
  There are 50/10 = 5 sets of 10 devices in the school.
  So the school will pay a total of $60 x 5 = $300 for the $60 software package.
  Thus, the school can save $400 - $100 = $300 from buying the $60 software instead of the $40 software package.