Retail Therapy?

Already I am revving up for the start of my challenge. A flyer from another supermarket is doing a lot of 'bogofs' and so am stocking up on cheese biscuits and washing up liquid.
Tip: When the detergent bottle has only about 1/2" left , squeeze the air out of the bottle and hold it under a hot or cold tap, release the air and it will draw in enough water to dilute, then give it a good shake. Don't oversqueeze when it's used and it will last much longer.