Step 2 of 5

What you need

Two files, and both of them come from equipment you already have. Ask each for the same ninety days.

One thing to hand to whoever looks after your tills

Today this reads one shape and only one: both files have to arrive with an exact first line. That is a two-minute job for whoever set up your system, and it is spelled out in full — with a working example you can send straight back in to see what happens — on the two pages below.