Firstly, we convert all the weight in the same unit,
i.e. gram into kilogram and then find the total weight.
Given, weight of potatoes = 1 kg + 200 g
= 1 kg + 200 g = 1 kg + 2001000kg
= 1 kg + 0.200 kg [∵ 1g = 11000kg]
= 1.200 kg
Weight of dhania = 250 g = 2501000kg = 0.250 kg
Weight of onion = 5 kg 300 g = 5 kg + 300 g
= 5 kg + 3001000 kg = 5 kg + 0.300 kg
= 5.300 kg
Weight of palak = 500 g = 5001000 kg = 0.500 kg
Weight of tomatoes = 2 kg 600 g = 2 kg + 600 g
= 2 k g + 6001000 kg [∵ 1g=11000kg]
= 2 kg + 0.600 kg = 2.600 kg
∴ Total Weight of his purchases in kg
= Weight of potatoes + Weight of dhania + Weight of onion + Weight of palak + Weight of tomatoes
= 1.200 kg + 0.250 kg + 5.300 kg + 0.500 kg + 2.600 kg
= [1.200+0.250+5.300+0.500+2.600] kg = 9.850 kg
Hence, the total weight of his purchases is 9.850 kg.