The monthly finance charge when the previous balance method is used is $245.83
The finance charge using the previous balance method will be:
= 3000 × 15 × 1/(12 × 100) + 2500/12
= 3000 × 15 × 1/1200 + 208.33
= $245.83
The charge when the adjusted balance method is used will be:
= $3000 - $2500
= $500
The charge when the average daily balance is used will be:
= 3000 × 15% × (1/12)
= 3000 × 0.15 × (1/12)
= $37.50
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