pretty sure gronk is on like 700 ( well he should be considering he wa offered like 800 to leave storm so I doubt he'd settle for 300k less)According to this Slater and Smith earn 1.5m a year combined.
Throw in Cronk who's on about 500 and you get 2m. So Storm pay 40% of their cap on three players, find that really hard to believe lol.