Porridge and the drugs got me to work

Well they did but once I got there, I felt rubbish. I do not recall much of the day, except I did not really leave my desk all day, a very bad sign and I was helping our eldest invent some Maths questions. Unfortunately wee Johnny was dispensed with in favour of Kevin who made sausage sandwiches for 23, packs of 8 sausages costing £2.50 each and each sandwich taking 1 minute 25 seconds to prepare. Do the math, as they say, do the math.

12°