1. Specify the target:
"Expenses" measured in "$" and aggregated with "SUM"
2. Define the unit:
"Item"
3. Create the matter:
"Purchases" of "Number" type, measured in "Item", and linked to
the "Expenses" target
4. Within "Purchases" matter list as items all your habitual payments.
For each item specify corresponding value of "Expenses" target,
calculated per 1 item (i.e. item price). For example:
"Newspaper" ("Expenses" = 3.50 $)
"Lunch" ("Expenses" = 10.00 $)
"Gasoline" ("Expenses" = 0.30 $)
...
5. Each time you spent some money, select a purchased item from
item list, enter number of purchased items, and tap "Add". UTS will
automatically recalculate the sum of money spent and store it in
database.
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