Tài chính cá nhân VN

Supply multiple popular tool about financial:
- Calculate Net salary according to Gross salary, calculate Gross salary according to Net salary
- Calculate bank's interest rate by using 2 methods
- Calculate ROI
- Calculate compound rate
- Calculate TVM - Time value of money
- Calculate IRR according to NPV
- Calculate IRR according to cashflow
- Calculate installment's interest rate
- Calculate period/interest rate to get double asset by using Rule 72