A pharmacy in the UK buys paracetamol, a painkiller known in North America as acetaminophen, for 0.57pound and sells them for 1.39 pound . What is the gross margin %? Due to supply chain interruption the cost of the some of the ingredients rise and the manufacturer increases the cost of the paracetamol to 0.67 pound from 0.57 pound . The selling price stays at 1.39 pound. What is the new margin %? The cost price remains at the 0.67 pound and to take advantage of the COVID-19 panic among consumers the pharmacy changes the selling price to 9.99 pound. What is the new margin %? How anxious are parents?