Approximately how many "hundreds and thousands" are there in a standard 100 gram tub of "hundreds and thousands"?

Better late than never I suppose... besides, the world needs to know :-)

My digital scales can weigh < 1 gram, so..... I tipped some 100s and 1000s onto them, to get a weight of 0.16 grams. There were 143 of them.

So 100 grams = 143 / 0.16 x 100 = 89,375 on average.

I make that 1.1 milligrams each. A metric tonne would contain 893 million of them, which is a lot of cup cakes.