Answer :
You would estimate.
So round 239 to 240, and 115 to 110.
240 - 110 = $130
No work out the difference from 239 to 240 ($1) and 115 to 110 ($5), and subtract those from the answer
$130 - $5 - $1 = $124
So round 239 to 240, and 115 to 110.
240 - 110 = $130
No work out the difference from 239 to 240 ($1) and 115 to 110 ($5), and subtract those from the answer
$130 - $5 - $1 = $124