Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_14 (plan_name VARCHAR, monthly_price_incl_vat__czk VARCHAR)

### Question ###
What plan has monthly prices of 300, 500, 750, 1000?

### Accurate SQL ###

SELECT plan_name FROM table_name_14 WHERE monthly_price_incl_vat__czk = "300, 500, 750, 1000"