A logistics company currently employs 15 specialist heavy-goods vehicle (HGV) drivers at a daily wage rate of £120.00\pounds120.00£120.00. To recruit one additional driver, the company must raise the daily wage rate for all drivers by £4.00\pounds4.00£4.00.
What is the marginal daily cost to the company of employing this extra driver?
£4.00\pounds4.00£4.00
£124.00\pounds124.00£124.00
£184.00\pounds184.00£184.00
£1,984.00\pounds1,984.00£1,984.00