SW - AP and DC discount!!!!!

[snookhams]

We are considering purchasing AP for SW, but part of our decision will include taking into account the discount for DC but it doesn't state what the % is for this discount. Does anyone know? we need to make of saving of over $150 on 4 DC swims with the SW - AP to make it worth our while purcahsing it! if this makes any sense to anyone other wise we will just go with the funcard