@YonderTweek I didn't convert any $ purchases last time, just put the currency as dollars as per the receipt. They convert to £ at their exchange rate though which is worse than what I was charged, so I miss out by a pound or so overall.
On their way to me this time: cheap top (no doubt from China), fleece lined leggings, mens hoodie, eyebrow pencil, hair extensions, shawl knitting pack, baby taggie, ear pods, eyeliner, kettle bell and very expensive door knob.
I came very close to reaching the limit - I thought I had about £10 to go, but one of the orders charged more than the payment page had said! They added taxes which I only noticed when I did the reimbursement, so I was within £3 (gulp).