Event Pricing input and toggle

[themixicecream]

I operate a food truck, so I have my normal prices, but often go to events where I have to increase my prices to cover event fees. It's tedious and takes a long time to update all of my prices one-by-one for each event, then change it back when the event is over. I would love an optional "Event Price" or "Special Price" input next to the regular price input on each item where I can add these event prices, then be able to toggle between regular and event pricing in settings somewhere.