I phoned a vet and asked the price of neutering a tom cat, worming and vaccinations.
That gave me a reasonable base line.
As it turned out, the kittens I ended up choosing were from a private home, too young to have been neutered and were not vaccinated, so the people whose cat had had them refused any payment. I gave them a large box of chocolates as a token thank you.
Covid jabs: Have you had yours?
Gardeners 👨🌾 : How much £££ ? 🪴
NHS U turn on trans terminology