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_22123920_4 (dates__mdy_ VARCHAR, gross_sales VARCHAR)

### Question ###
Which specific dates encompass the time period when "The Show Girl Must Go On" showed a gross sales figure total of $2,877,906?

### Accurate SQL ###

SELECT dates__mdy_ FROM table_22123920_4 WHERE gross_sales = "$2,877,906"