Manisha and Nilam were playing in the backyard. They were building a small hut with pebbles however there were not adequate number of pebbles in the backyard. They called Mohit whose home was 1000 m away from their home. But he can carry maximum of 1000 pebbles at a time. He has 3000 pebbles. Unfortunately he loses 1 pebble per meter he commute or part there of. What is maximum number of pebbles he can provide to his friends?

1) 833
2) 500
3) 667
4) 433