1. Take the starting amount of $100.
2. The prorate multiplier has a value of (10 ÷ 12) = 0.833.
3. Divide the starting amount by the prorate multiplier, for a value of $120.
4. Divide 120 by the subscription term of 12, for $10.
5. Multiply $10 by the billing frequency factor of 3, for a billable unit price of $30.