The numbers in the article don't quite add up. Shao bing is cheap food... usually 1.5 or 2 renminbi, maybe 2.5.
If they're selling 100 a day, every day, at 2.5元/each, that would be 250元/day and ~7500元/month.
7500元 is only about $1220.
So even if the article is only assuming revenue per month (and not profit), they still have to increase their price or sales (or some combination) by 267% to hit the $3,259/month mentioned.
If you're talking actual profit, which would be a more adequate comparison to his previous salary, then it's probably closer to a factor of 5.
Street vendors in Canada can typically sell well over 100 of anything on a nice day, I imagine in China with the greater foot traffic and culture of street food they're selling a lot more.
I read the story as them thinking that when they sold 100 per day when they started was validation that their plan was going to work.
If they're selling 100 a day, every day, at 2.5元/each, that would be 250元/day and ~7500元/month.
7500元 is only about $1220.
So even if the article is only assuming revenue per month (and not profit), they still have to increase their price or sales (or some combination) by 267% to hit the $3,259/month mentioned.
If you're talking actual profit, which would be a more adequate comparison to his previous salary, then it's probably closer to a factor of 5.