conversations.from: human
conversations.value: Can you walk me through the solution of: John earned 50 dollars an hour and worked 6 hours in the week.  If he spends 50 dollars on gas and wants to deposit 100 dollars in the bank, how many 25 dollar pens can he buy after he buys 5 pencils that cost 10 dollars each?
conversations.from: assistant
conversations.value: He earned $50*6=$300
  He has $300 - $100 = $200 to spend
  He spends 5 * $10 = $50 on pencils
  After buying gas and pencils he has $200 - $50 - $50 = $100 to spend on pens
  He can buy $100/25=4 pens