conversations.from: human
conversations.value: Penn operates an ice cream stall for a week. On the first day, she made $10. Every day after that, she made $4 more than the previous day. How much money did Penn make after 5 days?
  Work out the solution step by step.
conversations.from: assistant
conversations.value: On the second day, Penn made $10 + $4 = $14.
  On the 3rd day, she made $14 + $4 = $18.
  On the 4th day , she made $18 + $4 = $22.
  On the 5th day, she made $22 + $4 = $26.
  After 5 days, Penn made a total of $10 + $14 + $18 + $22 + $26 = $90.