Our Plasterboard Cost Forty Five Pounds a Sheet for a Week Because We Sold It Before We Booked It In

<p>Our trading system values stock at weighted average cost. Every time goods are booked in, it adds their cost to the value of what is already on the shelf and divides by the new quantity. It works well as long as stock is booked in before it is sold.</p> <p>In May one of our branches took a delivery of four hundred sheets of standard plasterboard on a Friday afternoon. The goods in clerk had gon

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