Calculate the total expenses for the month of February 2019, given the following transactions.

1. Paid salaries of $20 000; $5000 related to work carried out in January and $15 000 related to February work. 

2. Paid commission expenses of $18 000 in February. The commission related to January sales. 

3. Paid rent for the month of February of $5000 on 9 February.

4. Received a bill for $800 from a plumber for repair work done on 25 February. This will be paid next month. 

5. Purchased a block of land for $300 000 paying cash.