A business holds $500$ units of inventory, each bought for $3$. A mark-up of $20\%$ is used to set the selling price per unit. Prior to being sold, the units must be repaired, and this costs $400$ in total. What is the net realisable value of the inventory?
- A$1\,400$
- B$1\,475$
- C$2\,200$
- D$2\,275$