Sum from multiple workbooks

[zahar]

Hi all, i'm newbie here..

My problem:
- how to auto sum from many files at same folder ex: :C\Account and inside the folder got 150 files with .xlsx format and all files are the same format as picture.
- It's mean, when i change the data from the files, its will auto update at my new file. ex: master.xlsx
- FYI, the data range need to SUM is (D8:L35)

Sorry if wrong threads post and appreciate from all of you to help me.. Thanks guys..

[zahar]

add info:

- every file got 2 sheets. ORDER & RECEIPT. ORDER is a sheet1 & RECIEPT is a Sheet2. The values that need to SUM are from ORDER sheet.

Thanks.