{"label":"Income 1","value":5,"operation":"plus"}
{"label":"Income 2","value":10,"operation":"plus"}
{"label":"Income 3","value":15,"operation":"plus"}
{"label":"Total 1","value":30,"operation":"total"}
{"label":"Expenses 1","value":10,"operation":"minus"}
{"label":"Expenses 2","value":5,"operation":"minus"}
{"label":"Total 2","value":15,"operation":"total"}
{"label":"Income 4","value":50,"operation":"plus"}
{"label":"Income 5","value":10,"operation":"minus"}
{"label":"Income 6","value":35,"operation":"plus"}
{"label":"Expenses 3","value":10,"operation":"plus"}
{"label":"Total 3","value":100,"operation":"total"}
{"label":"Expenses 4","value":15,"operation":"minus"}
{"label":"Expenses 5","value":60,"operation":"minus"}
{"label":"Total 4","value":25,"operation":"total"}