I must watch it again but I think Kurt was trying to do the maths in his head . Always best to write it out on a piece of paper to confirm .

Why also did they leave it all on Kurts shoulders . Surely Zee and whoever else was with him should have confirmed or corrected his maths . Also the shop should have converted the measurements which they gave them i.e 6ft x 4ft into cms for them, as they must be doing this every day .

I know when I took a trousers to be shortened to a tailor I told him how much to be shortened in inchs and he converted it to cms. They must be used to working in centimetres these days.