The Tax Apportionment Calculator Classic Model

"The Tax Apportionment Calculator is an integrated set of sophisticated arithmetical and tax calculators that provide an easy way to calculate GST, or VAT or Sales Tax or Income Tax and apportion tax and income or costs across different cost centers. TAC is for business people, auditors and other users who need a versatile arithmetical calculator and who wish to calculate all the tax figures quickly. For instance allocate costs between business and private expenditure; check invoices; review the tax effect coming from changes to tax rates; examine price structures; complete many different arithmetical calculations. "