It depends on which plan you choose. You have to pay the listed price for the phones up front. If you get one of the Beyond Talk plans, then you will pay either $35, $45, or $55 per month, per phone. So, if I do the math for you....let's see....for three phones....either $105, $135, or $165 depending on which plan you go with.
That would depend on what plans you choose for the phones, each phone has to have a plan, all three plans will have accounts to be paid separately