How can change my quote and invoice to custom

I have attache the current quote format
I want to Change it to

Item, Description, S1, S2, No. of Plates, Total SQCM, Unit price, Total, Tax Code, Tax Amnt, Total

in this I need to have auto calculation in “Total SACM” (S1 x S2 x No. of Plates = Total SQCM)

Please help me create custom Quote and same in Ivoice

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You can add custom fields with placement on the sales invoice line to include the columns you want (Item, Description, S1, S2, No. of Plates, Total SQCM, Unit Price, Total, Tax Code, Tax Amount). However, Manager does not support automatic calculations inside custom fields. You will need to perform the calculation yourself and enter the result manually.

The same approach applies to both Quotes and Invoices. You can design the custom layout with these fields, but the calculation must be done outside the system before entering the values.

OK, Thanks. Is there a possibility to total in the bottom of the statement No. of plates - like total sqcm in the bottom