Tax Math is not correct due to premature rounding

I used the TAX functionality to add a handling Charge of 2.8% to all Event Fees. The Tax shows correctly in the Email Confirmation, But the attached INVOICE seems to have some rounding error, and creates ADDITIONAL Taxes.

LAST LINES OF EMAIL CONFIRMATION
Hotel IBIS Budget Ambassador Haeundae Standard Twin Ocean - 9th Sep - Hotel IBIS Budget Ambassador Haeundae Standard Twin Ocean 1 $ 128.00 $ 128.00 2.80% $ 3.58 $ 131.58 0
Hotel IBIS Budget Ambassador Haeundae Standard Twin Ocean - 10th Sep - Hotel IBIS Budget Ambassador Haeundae Standard Twin Ocean 1 $ 128.00 $ 128.00 2.80% $ 3.58 $ 131.58 0
Hotel IBIS Budget Ambassador Haeundae Standard Twin Ocean - 11th Sep - Hotel IBIS Budget Ambassador Haeundae Standard Twin Ocean 1 $ 128.00 $ 128.00 2.80% $ 3.58 $ 131.58 0
Amount netto: $ 2,964.00

Please see the attached PDF. Tax should be Identical 2.8% but it has some other values like 2.796875%

please help