How much can Richao Engineering Plastics (Shenzhen) Co., Ltd. get in a month? thank you

Richao Engineering Plastics and Dongli Engineering Plastics are both Japanese-funded enterprises. Both of them are in manholes, and the wages of ordinary workers are similar. Just entered the company, the basic salary 1500. During the three-month probation period, they have to work overtime, and so do they. They work overtime for two and a half hours every day, at the rate of 1.5 times, and at least one day on weekends, at the rate of twice. Insurance and provident fund will be bought. The salary a general worker gets one month after he becomes a regular worker is about 3000 yuan.