Oula's earnings for that month are 96* $100 = $<<96*100=9600>>9600
Tona made 3/4*96 = <<3/4*96=72>>72 deliveries that month.
Tona's total earnings for that month are 72*$100 = $<<72*100=7200>>7200
Their difference in pay is $9600-$7200 = $<<9600-7200=2400>>2400
#### 2400