Evaluate the following:

(i) 31.42 - 17.853 - 6.43

(ii) 13.01 - 5.428 - 3.703 + 2.99

By how much does the sum of 15.453 and 31.647 exceed the sum of 18.47 and 19.506?

Namita travels 20 km 50 m every day. Out of this she travels 10 km 200 m by bus and the rest by auto. How much distance does she travel by auto?

Asha purchased 5 kg 400 g rice, 2 kg 20 g sugar and 10 kg 850 g flour. Find the total weight of his purchases.