Example of compute sales tax function returning the sales tax

From function: Amount: 2000
State: CA    SalesTaxRate: 1  Salestax: 2000.00
From main: Cost: 2000
State: CA      stax: 2000.00
From function: Amount: 2000
State: OR    SalesTaxRate: 0  Salestax: 0.00
From main: Cost: 2000
State: OR      stax: 0.00
From function: Amount: 2000
State: TX    SalesTaxRate: 0.5  Salestax: 1000.00
From main: Cost: 2000
State: TX      stax: 1000.00