auditor tickmarks

[Tired & Confused]

In current version of Excel, how do you select the insert of an auditor
reference/tickmark of a number/letter in a circle and the sigma of the
letter/number for the total?

 

[Shane Devenshire]

Would you translate this question into English -

What are auditor tickmarks?
What is the "current version", I have clients using 97, 2000, 2002, 2007,
2004, 2008?
What is a number/letter in a circle mean?
What is a sigma of a letter?
.....