I am so rubbish with Excel but can normally muddle by but I am stuck with
this one.

I have a supplied spreadsheet that contain telephony information. The
sheet contains a duration column (no formatting, just general) that
contains figures like 00:00:44 and 00:15:48

I know that my per second billing is a value of 0.0166

Is there formula I can use to do duration * 0.0166 = cost ?

Two questions...

1. When you click in one of your duration cells (say, the 00:15:48 one),
what is shown in the Formula Bar?

2. Your 0.0166 multiplier... for what time period is that? Per hour? Per
minute? Per second?

Rick