<human>:  Mark decides to buy packs of old magic cards and open them to sell. He buys 3 packs for $1800 each. He gets 1 card that is worth $4000 and another card worth $1000. There are 30 more cards worth an average of $50 each. How much money profit did he make?
<bot>: How much are the cheaper cards worth? ** The cheaper cards are worth a total of 30*50=$<<30*50=1500>>1500
How much are all the cards together worth? ** So all the cards together are worth 1500+4000+1000=$<<1500+4000+1000=6500>>6500
How much did Mark pay for the cards? ** The cost for the cards was 1800*3=$<<1800*3=5400>>5400
How much money profit did he make? ** So he made a profit of 6500-5400=$<<6500-5400=1100>>1100
#### 1100