chemistry question ?

Question

a chemist needs to order Na2B4O7.one supplier offers it in an anyhydrous ( without water ) form, while another offers it as a hydrated crystal ,Na2B4O7.10H2O.if the prices from the two supplier are the same for a 500 g bottle ,which one would supply more of desired Na2B4O7 ? explain your answer .

Answer 1

its very clear that the anhydrous will be more because it does not contain water (water also has weight)

Answer 2

Presumably the non-hydrated one, as the 500 g are just the Na2B4O7, while the other one includes the weight of water, meaning there is actually less of the substance.