Rent collecting mission accomplished. Chen Jin started calculating on his phone, as always. "Four apartments, $1,000 each, that's $4,000. With Song Xue Jia's delayed rent, that's $8,000 in total. Cleaning service for unit 801 cost $30; $50 discount for Guo Yan; $50 management fee for each unit, so $200 for all four units. That's $4,100 in total. So my net income for the month would be…$4,100 minus all the expenses here, $3,800...divided by 2 is $1,900."