 
 <prompt> ```Matt fit buy key chains for packs of 10 for $20 or for packs of 4 for $12. How much money fit save if e choose buy 20 key chains at a lower price?``` <response>: ```Di cost of each key chain for packs of 10 for $20 na $20/10=$2.
Di cost of each key chain for packs of 4 for $12 na $12/4=$3.
Dey get price difference of $3-$2=$1 per key chain between di two choices.
If Matt buy 20 key chains for di lower price, e fit save 20x$1=$20.

Di answer go be 20.``` 