Serial number along with descriptions

Dear Admin,
Can you please add serial number along with description rows. I mean to say like this
Sr. # Description Qty Unit Price Amount
1 Item # 1 10 10 100.00
2 Item # 1 10 10 100.00
3 Item # 1 10 10 100.00

please search the forum and try reading the guides before posting a question.
this has already been asked many times and is already available.
check the guide below.

https://www.manager.io/guides/10303