It claims €6500/mth for 90 hr block time for new Capt. Given that is only possible for 10mths (due 900hr max ) that is €65000/year.
Divide by 12 & you have at best €5500/mth, and I bet most are on the lower end of the pay scales.
On that basis, if you don't do max hrs in year €4500 still sounds horribly possible.