Today

Bottle of coke: 93p
Various groceries in Tesco: £4.87
Total £5.70

Tested 4 items today, so that's $16... about £8. So I'm in front for the day, hooray!

Also: bought Pepsi Max 4 bottles in Tesco for £2.50, so won't need to buy any at work for a few days. Win!