Convert all the data in a signal unit , kg
Alok pucharsed $$ 1 kg 200 g $$ potatoes, $$ 250 g $$, $$ 5 kg 300 g $$ onion, $$ 500 g $$ palak , and $$ 2 kg 600 g $$ tomatoes are in kg
$$ = 1 kg 200 g $$ = $$1kg + \dfrac {200}{1000} kg $$ = $$ 1.200 kg $$ of potatoes
$$ = 0 kg 250 g = 0 kg + \dfrac {250}{1000} kg = 0.250 kg $$ of dhania
$$ = 5kg 300 g = 5 kg + \dfrac {300}{1000} kg = 5.300 kg $$ of onion
$$ = 0 kg 500 g = 0 kg + \dfrac { 500}{1000} kg = 0.500 kg $$ of palak
$$ = 2 kg 600 g $$ = $$ 2 kg + \dfrac {600}{1000} kg $$ = $$ 2.600 kg $$ of tomatoes
$$ \therefore $$ total weight of the purchase = $$ 9.850 kg $$