Is it possible to add a fixed percentage say 10% to a column of of different dollar values? For example, let's say you have three items listed in a spreadsheet in the usual way with item name, description and pricing but each item has different price like 25, 56 and 34 dollars, is there a way to add 10% or whatever fixed percentage to all three dollar amounts insetad of having to add the 10% to each one manually?