This is a professionally designed sales invoice sample which helps you in calculating the total sales amount, sales tax (deferred as well as advance) and deductions made, including any discount or rebate offered. This format is prepared in MS Excel to give maximum ease in using and making the necessary changes. Moving further, all the data can be added to a one-page sheet and the sums of each column can be seen in total row. Basically, this is a great template and very useful for recording sales transactions.