Answer:
widgets=float(input("Enter number of widgets you want to buy"))
if widgets<0:
print("Can't compute negative number")
else:
if widgets<100:
cost=widgets*25
else:
cost=widgets*20
print("The total cost of widgets is", cost,"cents")
Explanation:
First I made a variable called widgets to take input of the number of widgets the customer wants to buy. I use the first comditional statement to test if the number of items typed in is not less than zero.
The else statement computed the prices of widgets based on number of widgets greater than zero.
Another conditional statement to check if the widgets is lower that 100 or greater. The cost represents the total amount, in terms of cost it will take for some nuber of widgets.
The last line prints the total cost and some statments
