It's common sense really.. If you can't answer this question then you don't know how economics works. If the minimum wage would go up everything would go up, it's called inflation. It's always happened and it wouldn't stop now. As for companies firing.. As I said earlier, companies can't afford to keep employers employed with a livable wage, especially if it's including benefits. So they would either have to cut benefits or let some go. Not saying they would fire all their employers but they surely wouldn't be able to afford to keep them all either. So sacrifices would have to be made.
Yeah, well sometimes things can defy common sense - we would call them counterintuitive. It's not like every economic theory and prediction has always been confirmed in the past.
This guys: https://benjaminstudebaker.com/2015...age-does-not-automatically-lead-to-inflation/
mentions that there's no clear relationship between wage hikes and inflation. It seems that "if the minimum wage would go up everything would go up" is a bit simplistic, since it doesn't seem to be reflected in empirical evidence. There might be a bit of inflation, but it might not be enough to offset the income gains. The same goes for employment as well. If raising the minimum wage by 30% causes a 5% reduction in employment for minimum wage workers, the average minimum wage worker is still benefiting.