setup expressions personal
start assigning variables
added prompts and alerts
added note for step
add sales tax variable
removed sales tax, not sure how to round off
change to add calculation per cat
added prompt for number of cats
added prompts and variable for # of cats
added note
added note
added note
added new item
added new entry to total
modified note
modified alert and added variable to equation
fixed alert to read correctly
fixed grammar in alert
changed denomination in item cost
changed note to be clearer