>Do you need a screenshot and red box around the text or would you believe me if I tell you it is written on their lambda pricing page near the beginning ? It's also written in docs about configuring lambad functions so at this point it is PEBKAC/RTFM issue, not "them not being upfront"

Simple CPU time calculator on the pricing calculator page when you enter the RAM would be sufficient, linking to the said docs. Trivial to implement, really cleans up things when planning resource costs.