You'll probably need very little more than to add up a column and maybe change the numbers to show 2 decimal places.
Go to the cell you want the total in, type =SUM(
Click the first cell with numbers in, drag down to the last cell, type ) and enter.
This will create something along the lines of =SUM(C4:C12) You can type it direct if you get flustered.
To change the number of decimal places, highlight the cells you want to change and either on the menu bar, pick the .00 button and adjust until you get the right ones - or highlight, right click and select format cells-number and tick the little box for 2 decimal places.
The other thing you might need to do is sort alphabetically - highlight all of the rows you want to sort, including the header, top bar menu - DATA - Sort A-Z . You might need to tick the right hand of the box saying the columns have headers, then pick the name of the column you need to sort by.
Sometimes they're interested in seeing if you can spot two very similar names or an error. If that's the case, you might need to select two rows for sort - by surname and then by first name, for example.
Basic Excel is really quick to learn once you're looking at it.