How are hair transplants charged (Graft or Follicle)?

[GettingOld]

I have completed my transplant about a month ago. So far I am satisfied with the process but am curious about the pricing protocol that is typical. I was quoted 2,5 euro per graft by FUE and was charged for 3,000 grafts. After the procedure I got a summary as follows:

single 497
Double 1452
Triple 982
Multiple 72

Average hairs per graft 2.21

Does this mean I received somewhere in excess of 6,000 total hairs transplanted. Is 2.21 considered an average number of hairs per graft (better/worse than average?). If I understand this correctly, the greater the density in the donor area, the greater the average per graft, the greater the bang for the buck so to speak. I am clear on the protocol for how this is typically charged.

[GettingOld]

I meant to say "Am I clear on the protocol for how this is typically charged?"