???

Your math is completely wrong here unless there is some huge assumption you are making!

Someone with 5 employees working 35-hours per week, 52 weeks per year (employers need to pay for holidays and vacation pay) at minimum wage they are earning $20,748/year right now at $11.40/hour.  Total direct labour costs are  $103,740/year for the 5 of them.

If labour is 10% of revenue than, for just over 100 grand in labour costs, you're looking at just over $1.0M in revenue, not $6.2M.  Even if you add in a lot of "extra" costs for labour (wage taxes, administrative costs) you're probably only looking at $150,000 or so, so $1.5M in revenue by your numbers.

Increase minimum wage to $15/hour and the direct labour costs rise to $136,500/year, a $32,760 increase.

That would require a 2 to 3% increase in prices to cover.

Similarly for your restaurant example it would require a 6 to 7% increase in prices.