Rcm on gst

WANT TO KNOW ABOUT RCM ON DAILY EXPENSES.

FOR INSTANCE

LABOUR ON 1ST JULY 2017 IS 5000 AND FREIGHT IS 1100.

LABOUR ON 2ND JULY 2017 IS 4000 AND FREIGHT IS 1600.

LABOUR ON 3RD JULY 2017 IS 3000 AND FREIGHT IS 1600.

LABOUR ON 4TH JULY 2017 IS 2000 AND FREIGHT IS 3500.

LABOUR ON 5TH JULY 2017 IS 2000 AND FREIGHT IS 800.

IN THE ABOBE CASES IN WHICH CASE RCM WILL BE APPLIED AND HOW??