1.
Credit card interest accrued: (1,308.00 - 75.00) * (14.75/100) / 12 = $16.76
Savings account interest accrued: 75.00 * (2.75/100) / 12 = $1.72
Total interest accrued: 16.76 + 1.72 = $18.48
2.
Credit card interest accrued: (1,308.00 - 150.00) * (14.75/100) / 12 = $16.10
3.
Interest saved by paying $150 to credit card instead of splitting the payment: 18.48 - 16.10 = $2.38.