conversations.from: human
conversations.value: Explain how to solve this math problem: Ken buys gummy vitamins.  They are usually $15.00 per bottle at his grocery store, but they are currently 20% off.  On top of that, he has 3 $2.00 coupons.  How much will 3 bottles cost?
conversations.from: assistant
conversations.value: The vitamins are $15.00 a bottle and are currently 20% off so that’s 15*.20 = $3.00 off
  The vitamins are $15.00 and they are $3.00 off so they are now 15.00-3 = $12.00
  He has 3 $2.00 coupons so that’s 3*2 = $6.00 in coupons
  He buys 3 bottles at $12.00 each so that’s 3*12 = $36.00
  He has $6.00 in coupons so his vitamins will now costs 36-6 = $30.00