Use an online calculator to do a "time value of money" calculation that shows him how much debt you can run up when you're using a credit card that charges 17% interest.
Assume that the Gross Profit is based on the calculationof (the investment return of the account balance) - (the interest paid).
假定净利润基于(投资收益)-(所付利息)的计算。
3
The gang's motives, however, and perhaps Lord Mandelson's especially, were more complex than a simple calculationof personal self-interest or lust for verbose kudos.