He's been here 30 months.
He's scored 14 goals.
If he's on 65k a week, that is £288,600 a month when you factor in NI.
288,600 * 30 = £8,658,000
Throw on top of that his transfer fee of £3,500,000 and that makes his cost £12,158,000
This equates to £868,428 per goal.
In actual fact, those figures re the cost will lower than the actual figure as he'll no doubt have received signing on money, win bonuses etc etc etc.
Assuming he sits out the final year of his contract, peacefully grazing on a patch of grass at BMH, that will be another £3,463,000 in salary costs, which will bring his total cost to £15,621,200 plus whatever he has cost in other payments.
Amazing bit of business, that.