mick paid 2.94 in sales tax on an item that cost $42.00 before tax. at that rate how much would he pay in sales tax for an item that cost $58.00 before tax?

1) Calculate the tax rate

rate = (tax / cost before tax)*100% = (2.94 / 42.00)*100% = 7%

2) Use the same rate to calculate the tax over the new item:

tax = cost before tax * rate = $58.00 * 7% = $4.06

Answer: $4.06