Supplementary 2017 Q1.3:
An amount of R3 will be donated to a charity organisation for every R100 or part of R100 spent by the loyalty card holder.
Allow the user to enter the amount they spent in a dialog box with R230 as the default value.
Example of output for R230
An amount of R9 will be donated to the charity.
Example of output for R500
An amount of R15 will be donated to the charity.