Promotional goods (up-sell)

Hi,

We have promotional goods offer(s), as the following:

1. Buy 400 from A get 80 from B

2. Buy 800 from A get 184 from B

3. Buy 1520 from A get 350 from B.

So, how this offer can be created, or we have to create separate offer for reach one?

Because it should be acting like this:  if the customer buys from 400, 410,600, 7000 -->  will get 80. But when the qty reaches 800 --> free goods will be 184

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Note: when offer 2 is applied, offer 1 should not be applied in the eligible order.

Also, when offer 3 is applied, offer 1 & 2 should not be applied in the eligible order.

Regards