Pull the data from different closed workbooks paste into master vba

Dear Experts

I have multiple workbook saved in folder i want copy data from closed books and paste into mastersheet particular criteria is
sum the column F:F and average the column G:G after 20th rows

copy from
Month_FEB.xlsx
Month_JAN.Xlsx
Paste Into
Master.xlsx

Path is C:\Users\maninata\Desktop\Personal\Excelforum\VBA\TASK_1

Find the attachment

AttachmentSize
Master.xlsx11.12 KB
Month_Jan.xlsx10.57 KB
Month_FEB.xlsx13.28 KB