A local homeschool team has made it to the National Science Olympiad next month. For some events they are allowed to use a four-function (or five-function that includes sqrt) calculator and it would be very useful if that calculator applied order of operations. I don't know of any that do. Does anyone here know of one? A brand name and model would be most appreciated -- a link to where it can be purchased would be great. It has to be a physical calculator, so please don't suggest online calculators or phone apps.
TIA
TIA