Perguntas de entrevista da empresa Government Digital Service

I was asked to implement a class that would correctly calculate prices for a small business selling only 3 items. One item was on a buy one get one free offer, the other was on a discount where the buyer gets a fixed discount after buying 5 or more items. The third item was on a fixed price. There were sample codes in Ruby and Java. There was also a table of test data - with the expected results