If you put four in your basket, right click on the image and click 'inspect'.
In the bar that comes up on the right, look at <img id=
The two numbers are 84406 and 84577, so just make sure you have one of each.
They don't put NC on sale - although I'd advise buying from the outside sellers as you get more bang for your buck and they sometimes run sales. But items do go on sales - GBC's, and cookies usually and pet slots were on sale earlier this month for the birthday.
40 FFQ's gave me just shy of a year at 360 days worth. So 41 if you want to be really thorough. At 50NC a piece, it's... 2000NC for a years worth in the sale and they are something I've been using frequently.
I'm gonna have to buy some more NC, I fear. I have bought baby capsules as well, and I'm definitely running low. Probably won't partake in Christmas stocking thing though as the items were lacklustre last year. Didn't do Halloween either...