1- Credit sale to shyam ₹6000 were not recorded.

2- Credit purchase from ram ₹900 were not recorded.
3- Goods returned from mohan ₹500 were not recorded.
4- Goods returned to hari ₹300 were not recorded.
Please solve but also explain.

1. I sold 6000

4. hari returned 300 so I am owed 5700
3. mohan returned 500 so I am owed 5200
2 . I bought 900 from ram so I am owed 4300