So “diplomas” is an acceptable plural, and I’ll let you get away with “diplomae” (you could argue either.)  But the most proper plural in my opinion is “diplomata.”

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Answer: $1.00

Now you’re going to see a big variation here, and the math is way too complex to answer in one sentence.  Good looking cards should cost $1 apiece, but $1.25 is not uncommon; and quite often it may say $0.80 but only come with an unnecessary sheet of tissue paper (or two) which costs $0.50 a sheet!  I saw one the other day that had “95 cents apiece” in big letters, and then when you do the math it was actually $1.65!  That’s what salesmen do–they package things until you can’t see the real price.  Since I don’t work like that and I want to encorage the industry to be honest, I’ll say I’ve rarely seen an invitation so nice that 50 of them costs the student more than $50. 

On the back end, there can be a variance based on

• how thick the paper is,
• how many you get,
• which invitation you choose,
• from which brand, and
• how rushed your printer is;

but don’t ever let anyone get away with telling you these things substantially affect YOUR price. 

No, rich schools don’t spend more.  I say that because people say “okay, $1, I get it, but I go to _________, where our school pride makes us only get the best!”  No, $1 is for the best–elaborately foil stamped, 80 pound paper of a fine fabric, etc.  The press I use (and there are only a few in the country) also prints certificates for the Supreme Court.

Call me if you have any questions.  (415) 827-5630.