For what it's worth I believe the $1.25 transaction came from extrapolating this to all potential future free transactions being $10 transactions as well. If each receipt is 1/8 of a free meal then we can consider disallowing that one to be costing you $1.25. This analysis is a bit sketchy but if we can assume a decent probability of having many more transactions at this restaurant and we don't know how many at this point it's a fair value to give.