Please add the ability to display the number of product units received (e.g., neurotoxin units, filler syringes) and the cost per unit on client receipts. Currently, receipts only show a service total, which doesn't give clients visibility into what they actually purchased.
This matters for two reasons:

Client record-keeping - In medical aesthetics, clients need to track the units received per treatment for their own health records and to reference at future appointments (e.g., "I received 40 units of Botox at $14/unit at my last visit").
Transparency and trust - Clients should be able to see exactly what they paid for, not just a lump-sum total. An itemized breakdown (units × price per unit = total) builds trust and reduces billing questions and disputes.

Ideally, this would appear on both printed/emailed receipts and in the client's purchase history in their account.