Finish writing first equation, now to check it if it works.
Added console.log to print answer to the first equation.
define new variable (fillUp) and added equation to find its value
Small changes to what is printed in console log and added information to comment on line 14.
declared new variable (fillip)
Fixed information in comments on line 14
assigned value ( which is a equation) to variable fillup.
correction on the name of variable. ( fillup to fillUp)