Economics
Financial mathematics
Interest, future and present value, loans and returns.
Economics
Compound interest
A = P × (1 + r / 100)ⁿ→EconomicsSimple interest
I = P × r × n / 100→EconomicsSimple interest amount
A = P(1 + rn / 100)→EconomicsPresent value
PV = FV / (1 + r / 100)ⁿ→EconomicsMonthly loan payment
A = P · i(1 + i)ⁿ ÷ ((1 + i)ⁿ − 1); i = r ÷ 1200→EconomicsEffective annual rate
EAR = ((1 + r / m)ᵐ − 1) × 100%→EconomicsReturn on investment
ROI = (R − C) / C × 100%→EconomicsCompound interest future value
S = P(1 + r/100)ᵗ→EconomicsAnnuity future value
S = A((1 + i)ⁿ − 1) / i→EconomicsAnnuity present value
P = A(1 − (1 + i)⁻ⁿ) / i→EconomicsReal interest rate
rᵣ = ((1 + r)/(1 + π) − 1) × 100%→EconomicsROI from profit and investment
ROI = Profit / I × 100%→EconomicsPayback period
t = I / CF→EconomicsCurrent inventory days
Nₜ = I / 2→EconomicsSafety inventory days
Nₛ = Nₜj→EconomicsInventory days norm
N = Nₜ + Nₛ + Nₜₑₓ→EconomicsInventory normative
W = NDp→EconomicsWork-in-progress coefficient
K = M + (1 − M) / 2→EconomicsDaily WIP normative
W = TCDK→EconomicsAnnual WIP normative
W = T(C/360)K→EconomicsFinished goods normative
W = ND→EconomicsTotal working capital normative
W = Wᵢ + Ww + Wf + Wg→