[ipv6-wg] What is difference among /32 , /48 and /64 as charge?

We are a LIR as small class. We want to apply for ipv6. Is there a difference as charge apply for between /32 and /64 ? I mean, a LIR who has large class, when that LIR applies for /32 and has it, What does that LIR cost for that ? Also, While We are a LIR as small; 1- Can we apply for ipv6 /32 ? 2- What is difference among /32 , /48 and /64 as charge? Thanks a lot.