Tom's normal working hours on Monday are 7 hours, for which he will be paid £15 x 7 = £105.Tom worked for an additional 4 hours on Monday, for which he will receive overtime pay. His overtime rate is 1 x £15 = £15 per hour.So, Tom's overtime earnings for Monday are equal to £15 x 4 = £60.Therefore, the total amount Tom earned on Monday is £105 + £60 = £165.Total = £165