Parts Discount Calculator Parts Discount Calculator Assumes all parts are marked up 40%. The calculation in here will be the overall discount to the customer based on dollar value of the parts purchased at cost. Customer Name Invoice Number Overall cost of parts (before 40% markup) Less than $1000 Between $1000 and $2000 More than $2000 Dollar Value of parts (Less than $1000) Dollar Value of parts (between $1000 and $2000) Dollar Value of parts (More than $2000) Discount to be applied to customer invoice (between $1000 and $2000) Discount to be applied to customer invoice (between $1000 and $2000) If you are human, leave this field blank. Submit