> All that matters is the price at the end Paying $1000 today is not the same as paying $1000 in six month's time - that's the time value of money that people

> All that matters is the price at the end Paying $1000 today is not the same as paying $1000 in six month's time - that's the time value of money that people have mentioned. If you just add up total amounts without factoring in differences between how payments are distributed over time, your comparison can be incorrect, since the larger number in that case isn't necessarily the more expensive one. To do a proper comparison, you need to calculate the net present value (NPV) or a similar measure that takes into account time value. See e.g. https://corporatefinanceinstitute.com/resources/knowledge/valuation/time-value-of-money/ https://corporatefinanceinstitute.com/resources/knowledge/va...