This is quite hard to get your head around.

Thanks to bob the bolder who uploaded this picture.

Misspellings will happen from time to time, but a bit of consistency should be the least one can expect. Why vary the endings of ‘interior’ and ‘exterior’ when they’re the same phonetically? Even the simplest of simpletons should be able to misspell something the same way twice.

This is made even more confusing by the fact it’s difficult not to read it as ‘£4 for inertia’. I need a lie down. Don’t hold me back.