From each tire repair, he made 20-5=$<<20-5=15>>15 profit
So repairs made him a profit of 15*300=$<<15*300=4500>>4500
The two complex repairs each made him 300-50=$<<300-50=250>>250 profit
So those added 250*2=$<<250*2=500>>500
So his total profit from everything was 4500+500+2000=$<<4500+500+2000=7000>>7000
So he made a profit of 7000-4000=$<<7000-4000=3000>>3000
#### 3000