$6.00 per hour
Mitch,
With chalk users like you, a seller would have to go on the government dole to survive. Lol
All kidding aside, your numbers look okay, except they don't appear to cover the labor costs of applying and smoothing the glue.
The next time I make a batch of MC glued washers, I will have to time myself to see how long it takes to process 15 pieces of chalk.
I'm just estimating right now but it probably takes me 2 minutes to properly fasten the washer to the chalk. 30 pieces of chalk per hour would mean a person could earn $6.00 per hour if they earned $.20 per each chalk.


If I removed the paper from the bottom of the chalk, it would involve even more time.
In my mind, an entrepreneur should think long and hard before embarking on this enterprise. There doesn't seem to be a market for it nor is there enough profit in such a simple process to justify selling it.
I'll continue attaching chalk for my personal use and won't recommend anyone to go into this business. (Just thought about it just now, but we didn't include any packaging or in our estimates....WHEW :yikes

And don't forget about shipping costs. These days many people expect "free" shipping.
JoeyA
I am a player that uses Master Blue Chalk, and I use it until it has almost disappeared. Each cube last me about 1-1.5 years.
I got a box of 25 pieces with my pool table (7 years ago) and it is about 1/2 done.
If I were to buy Master Chalk cubes in a box (gross) they cost about $0.25 each.
A washer costs <let's say> $0.02 in bulk.
Hot glue costs <let's say> $0.03 per drop.
So, my guess is that you would have to sell them at less than $0.50 each to have a market.