Isn't there a performance bonus at work in RT Mart?

RT Mart has a performance bonus when he goes to work. The rank of the staff is Grade A, and the performance pay standard is 30% of the standard salary minus the attendance reward; The rank of the staff is Grade B, and the performance pay standard is the standard salary minus 25% of the attendance reward; The rank of staff is Grade C, and the performance pay standard is 20% of the standard salary minus the attendance reward; The staff rank is D, and the performance pay standard is 350 yuan. The staff rank is E, the performance pay standard is 250 yuan, the staff rank is F, and the performance pay standard is 200 yuan. Standard salary refers to the sum of basic salary, performance salary, attendance reward and post allowance.