Slider Scale

I am using a slider question to ask for willingness to pay. Presently I have a scale from £0-£1000. I would like to have the scale move in an expontial fashion rather than ordered. e.g. £5, £10, £20, £40, £60, £80, £100, £120, £150, £200, £300, £400, £500, £750, £1000

Is there a method of pre-determining the cut points of the scale?