Actually, the NPK value of molasses is generally known to be 1-0-5. It's not listed, because molasses is marketed as a food product for humans and livestock rather than a fertilizer.
If you aren't employing some manner of organic growing method, which is to say you're seeking to create fertility within an actual soil through natural processes, rather than simply using the soil to anchor a plant that you feed with liquid chemical nutrients, than you're wasting all your money on it, for it really isn't doing anything useful enough for you to justify the expense and hassle.