Boston Global Determine the Commissions on The Option Transaction Questions

I?m studying for my Accounting class and don?t understand how to answer this. Can you help me study?   CommissionsDollarAmount     Commission Rate$2,500 or less     $29 + 0.016 of dollar amount$2,501-$10,000     $49 + 0.008 of dollar amountover $10,000        $99 + 0.003 of dollar amountMaximum charge: $40 per concract on the first two contracts, plus $4 per contaet thereafter Minimum charge: $37.25 plus $1.75 per contract