correct formula

https://i0.wp.com/orahyplabs.com/wp-content/uploads/2017/09/correct-formula.png?fit=1024%2C350&ssl=1 https://i0.wp.com/orahyplabs.com/wp-content/uploads/2017/09/smartview.png?fit=1024%2C260&ssl=1 https://i0.wp.com/orahyplabs.com/wp-content/uploads/2017/09/formula.png?fit=1024%2C337&ssl=1 https://i0.wp.com/orahyplabs.com/wp-content/uploads/2017/09/custom-format.png?fit=1024%2C610&ssl=1 https://i0.wp.com/orahyplabs.com/wp-content/uploads/2017/09/correct-formula-1.png?fit=1024%2C350&ssl=1