Silica filler on sale at West Marine

I was looking around www.westmarine.com close-outs and found
Interlux 101 (data sheet says "Amorphous Silica") filler on sale for $1.88 a
quart-sized tub.
I was ordering some other stuff and threw 10 of the 101 powders on the
order.
On the packing list they billed it at .88 a tub.

Justin