Well if that wasn't an invitation, I don't know what is!

Centre is a French spelling - along with metre, litre and so on. The verb compute is from the latin - you can look up the etymology yourself. The "er" on the end signifies the person/object who/that is doing the action...

So even the French couldn't misspell waiter as waitre because the er on the end refers to what the person is doing. Fortunately there are not that many words ending tre From what I can see, all these tre words are French in origin and brought into use in England by French Kings between 1066 and about 1500

So I guess that's True!

The next person is considering an offer of some description.