The answer to your question is $720
Yes that’s it son welp ok
(30/100)(90*3+50*4)
(30/100)(270+200)
(30/100)(470)
$141.00
She spent $23.25, how I got my answer.
I divided $13.50÷2=$6.75 then I added $6.75+3=$9.75 then I added $9.75+$13.50=$23.25.
I hope this helps.