You are making the same mistake that I see time and time again. You are mixing up the two elements of data capture and final reporting. The two require quite different treatments.


A lot of people start by designing the form that they expect to see as the final report, and then wonder why it's so difficult to subsequently analyse and summarise or extract information from it, Yours exhibits all those features.


You should always capture data in a simple two dimensional table and worry about reporting information from it afterwards. Without exception doing this you will always be able to easily obtain management information. Rarely is this the case if you start the other way round.
You will also throw open the whole wonderful world of the powerful Pivot table functionality.

You are also complicating things immensely by merging cells. Avoid this at all costs. They are a real nuisance and can seriously compromise other areas of Excel.

I suggest you change the way you capture data. A typical database would have columns for
Date
Staff Name
Course ID
Laptop Type (entries being Small or Large)

and maybe others - I don't understand what the numbers or 'pupils' means
Typically you'd use a date entry form to allow staff to update their details. Once you have a flat two dimensional table then reporting against it will be simple.