Rounding up total

The US is stopping the production of the $0.01, we will no longer be able to give out the exact change when collecting cash. Linga needs to be able to round up the total to the nearest 5 or 0. 
$0.01 and $0.02 rounds down to 0.00

$0.02 and $0.04 rounds up to $0.05

$0.06 and $0.07 rounds down to $0.05

$0.08 and $0.09 rounds up to $1.00

Many other POS have this function already.