Fruit Of The Loommens Big Man White A-shirt Underwear (pack of 3)

WIll these 'tall" shrink to normal size after a wash and dry like my hanes tall did?

How many in a pack

How low does the V neck drop? I don't like them to low.

Why is the price of the 3-pack of 3xl so much more expensive than the 3-pack of the 4xb or 5xb?