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input values
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• input fields allow entering simple formulas using arithmetical espressions
• example of a valid input: (1+2*2)/3
• most of the input values can be "tuned": hover mouse over and scroll up/down with Shift pressed

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output values
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• output values - calculatable automatically based on input values
• fields with output values are disabled for manual input
• when pointed with a mouse - tooltip shown for the field will display the field's calculation formula
• - tooltip for input values will display the field's variable name (used in formulas)

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house price
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• buying house price
• the same price is being used for "home ownership tax" (eigenwoningforfait)
• i.e. it is treated also as a WOZ houes value

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"net" amounts
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• these calculated by substracting tax benefits (hypotheekrenteaftrek) from "gross" amounts
• in case tax reimbursement goes into principal debt repayment (tax refund target = 2) - benefits assumed to be 0

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Interest rates
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• Comparison
• ABN Amro