Ok... how many times did you mark up the frame material as well as what did you charge for each step of the piece? As I don't use anything but the good mats I have no idea what white core basics would cost. Let's see your breakdown of the job and then we can compare better. Personally, My price for each piece would be around $120 per.
In the beginning, all of your prices will seem too expensive even if, in reality, it is too low. Forget what YOU would pay to have something framed.
Just remember you can't afford yourself and you will be ok.
What I did when I first started out was to get a ledger book and break out EVERY bit of materials I used on a job. If I messed up a mat cut, I entered an amount for 2 pieces. The total of your materials should try to come in around 20% of the job. If for some reason you have one that comes in at 35%, the breakout will show you where your cost overrun was. After a while you won't have to do the breakout for every job but you should still do it every so often just to make sure you are on track. The lower you can get the COG, the better off you will be.
If you can't get the COG low enough, then you need to raise your prices enough to cover all of your materials, overhead and profit. Don't forget, profit isn't your salary.