HI Chelseagirl!! Welcome to techIMO ! Having your right front axle replaced can cost many hundreds of dollars, depending on your car model/year/parts. Please tell us the maker/model/year. Did the shop give you an estimate?
While, technically it isnt that hard to replace the axle, I would pay to have them do it. Normally tools are needed that are used for nothing else, and those tools are very expensive just to replace one axle.