Invoice Form

hi all .. i'm new here , I'm not familier with the access so i found it's better to ask the profi. pplz and here i come to u
i'm better in Excel
anyway
here is the steps of what i try to do and i already attached a simple example
this invoice form will include the sales throught the month . so it's monthly
and here is what i try to do
1-a form to Enter in it the
Coustmer name | project |product descp. |measure|uni.price|total
2-i may have more than 1 item in the same invoice.
3-invoice serial no. to be like yyyymm######
i don't know is that able cause when i tried to make an invoice it make on a WEB Page and saved it in some place , i thought i can be in the program it self , and i attached also the form of how the invoice could be ,
anyhelp ??