price increase button

It would be extremely beneficial to be able to add a price increase button where we can either set an increase by % or by increments as low as 25 cents. Most food businesses increase menu items by 25 cents every quarter or 6 months so it is a gradual increase that customers don't complain over and allows us to adjust with our food costs. To have to update each individual item (we have over 300 menu items) is a massive waste of my time. Thank you