Puccini plc. Once each year, Puccini Ltd. buys a quantity of a perishable commodity. It processes and packages the commodity immediately and holds the cartons for sale one year later. Purchases have to be made in units of 100kg - the current buying price is 30 per 100kg. Each 100kg yields sufficient output for a batch of 100 cartons and the processing and packaging of each batch costs 70. Storage costs, excluding interest, amount to 25 per 100 cartons p.a., payable at the end of the year. Market conditions are such that Puccini takes its selling price as fixed by competitive considerations. Sales are made in cases of 100 cartons. The selling price, next year, for current output is estimated