The first scheme:

The pony passes 5 10 kg first,

Then bear, pig and calf live together.

160+400+240 = 800kg

The second plan:

Pony and bear pass 5 10+ 160=670 kg first.

Then pigs and calves live together.

400+240=640 kg

The third scheme:

Pony and pig pass first, 5 10+400=9 10 kg,

Then the bear and the calf live together.

160+240 = 400kg

The fourth scheme:

Pony, bear and calf pass first, 510+160+240 = 910 kg.

Then the pig weighed 400 Jin.

The fifth, sixth, seventh and eighth schemes are to change the order of the first four schemes.

Thank you. Please accept it.