A web page generated from a query displays a table of results with one column being a field into which I can put numbers. Let's call column A and B the results (which are numbers) and column C the field into which I can enter a number. I want to be able to add A+B and then multiply the sum by a variable of my choosing (x). I then want to repeat that same calculation ([A+B]*x]) in all rows in the table. I'm picturing a browser extension that creates a drop down in column C when I click on it which allows me to enter a multiplier, but I'm not wedded to a particular implementation.