> Hypothetically you could just invest $2400 and use the interest to pay the subscription. Saving $2,600. Except you do not actually use software forever, and

> Hypothetically you could just invest $2400 and use the interest to pay the subscription. Saving $2,600. Except you do not actually use software forever, and there is also no market for licenses for 10-year-old versions, so you have to actually calculate it as an annuity. So, if you expect to use the software for ten years, the NPV of 120$ per year would be about 900$ at 5% interest.