Screw Gauge

Q.

Alex went to buy some apples and oranges. The total weight shown on the weighing scale was 7 kg. If the weight of oranges are 2 kg 700 grams, what is the weight of apples?

1. 304 gm
2. 304 kg
3. 300 kg 4 gm
4. 4 kg 300 gm