Fair enough, here is my take on it I am home now so I have time to play.
I haven't sold many cakes or cookies (haven't been lookin' too)
but if someone where to ask me:
How big is your oven? My oven isn't that big, I can do about a dozen cookies at a time so this would take about 8 minutes (I am guessing) per dozen so a total of 800 minutes this would be 13 hours of baking! Hopefully your oven is bigger than mine. Hence in reality I would be to big a chicken to take on this order. : )
$7.50 per dozen cookies $750 total (the price for fudge or chocolates would be higher as the ingredients are more expensive so this is cookies only with no decorations)
The 12 x 18 cakes $54 each (I haven't sold a lot of cakes, not much experience but I think my decorating is decent, and for each slice to have a piped bulb this seems more than fair, $1 per serving) ingredients, boxes, boards, foil and other misc stuff eats away at this pretty quickly for me...
So my total so far would be: $858 but... I haven't figured out how I would box up the cookies so this doesn't include cookies boxes if those are needed.
Or maybe trays would be easier but I don't actually have trays or have a spot to get even those plastic trays...(unless costco carries them??) so that's about as far as I can get without figuring out how to get the cookies to the location.
And if I needed to deliver them and set them up I would add on extra for those. How close are they to you? I might be willing to donate this for such a large order but would I need to set up and decorate the tables or would they be already ready? So much to think about!
After sitting down and really looking at all this, yikes, I would never be able to do such an order in my house. My kitchen is soo tiny, I hardly have room for a cake and a dozen cookies, I can't imagine where I would put 100 dozen.
Oh and as for a discount if it where me, I would already feel like I was doing them the cheapest I was willing to do them for. So no discount....otherwise I would hate myself, my family would be mad at me for being so crabby, I would be bald form pulling my hair out and slobbering in the corner from lack of sleep. (which probably would all be true anyway)
Best wishes, and don't stress too much. Only you can decide what is the right price for you.