<human>: Throwaway for obvious reasons. Background: I live in the state of Michigan. I work for a privately owned restaurant. I am a server making $3.10 p/h +tips (minimum wage in my state). We pay "tip share" (out of our tips) at a rate of 2.5% of our total sales for the day. The tip share goes to the hostess and server assistants (aka bussers). 

So frequently, I work the opening shift at work. I go in at 5am, the restaurant opens at 6 and the hostesses and bussers come in at 8. At 8am today, I printed a sales report. My sales from 6-8 were $200 (which is much lower than usual). 
I brought it to my managers attention at the end of my shift, with both reports (6-8 sales and total sales for the day), and told her I didn't think I should have to pay tip share on sales that were done before 8am. She told me I was petty for thinking this was an unfair practice.
Now, I realize today it would've only been $6. But this is every Friday-Sunday, $6x3=$18 add that up over a month and it's $72 and that's on a slow day. I have worked for corporate places that will have you close out your register when the first tipsharee(s) arrive(s) and start your sales fresh. Maybe I'm petty, but this doesn't seem legal.

Can you provide a brief overview of the text?
<bot>: in the restaurant industry, do you have to tip out on tips earned before the tipsharees(i.e. hostesses/bussers/bartenders) have arrived?