Convenient keys that you thought you knew but may be you didn't !
How to clear input errors smartly
Delete keys
How to count the total of multiple calculations
GT(Grand Total) key
How to make multiple calculations without taking notes
Memory keys
How to calculate using the same number repeatedly
Constant calculation
How to do rounding off easily
Round selector function
How to convert and calculate different currencies
Currency conversion function
How to set local consumption tax and make tax calculations easily
Tax calculation