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where:
• i is the interest or discount rate (decimal fraction) per accounting period.
• n is the number of accounting periods from 0, there may be several n's.
• P is a Present Value at time 0, may be positive or negative.
• F is a Future Value at a time n, may be positive or negative.
• A is a uniform amount per period for n periods, may be positive or negative.
• Single Payment - Compound Amount Formula, (F/P, i, n)

F/P = (1 + i) ⁿ
• Single Payment - Present Value (Worth) Formula, (P/F, i, n)
  P/F = (1 + i) ^-n

• Sinking Fund Formula, (A/F, i, n)
  A/F = i / (1 + i) ⁿ - 1

• Capital Recovery Formula, (A/P, i, n)
  A/P = (i (1 + i) ⁿ ) / ((1 + i) ⁿ - 1)

• Uniform Series - Compound Amount Formula, (F/A, i, n)
  F/A = ((1 + i) ⁿ -1) / i

• Uniform Series - Present Worth Formula, (P/A, i, n)
  P/A = ((1 + i) ⁿ -1) / (i (1 + i) ⁿ )

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