Mary is employed by Menton Manufacturers to sew dresses. The standard time to sew one dress is 40 minutes. She is paid R120 per hour and the normal working time is 8 hours per day. If she sews more than her quota, she receives 1.5 times the hourly rate on the additional output. On 31 October 2023 she sewed 18 dresses.

Calculate Marys earnings for 31 October 2023 using the straight piecework wage incentive scheme. Show calculations.