What happens with boots of striding and springing and haste?

So I am currently playing a vine leshy ninja am taking the acceleration of form ninja trick and boots of striding and springing Important information that you need to know before I ask the question: The race’s speed is listed as 20 feet The boots are a +10 bonus to base speed this is an enhancement bonus Haste increases all forms of movement by 30 feet to a maximum of twice the subject’s normal speed using that form of movement this is an enhancement bonus

So my question at hand is: how do these interact so far me and my gm have come up with three possible answers 1: haste doubles race move speed, replaces boots as they are both enhancement (Total 40 feet) 2: haste doubles your move speed, replaces boots as both are enhancement (Total 50 feet) 3: haste doubles your move speed- but the enhancement bonus to base speed is different than bonus to total speed as a result they stack (total 60 feet)

Does anyone happen to know the answer?