Example ledger to complete computations in Allowance Calculator.
8 JUL 2018 Start
60 Opening (dollars) -35 Lego Set (dollars) SUM Balance (dollars)
When we return from shopping with our youngest child, we can note the new purchase on this ledger and the Method Plugin will update the `Balance`.
Occasionally we clean up this page by 1) updating the `Start` date to today's date in the Calendar item above, 2) adjusting the `Opening` line to reflect the current value in calculated `Piggybank` over on the Allowance Calculator, and 3) clear out the older purchases.