Answer:
Final amount paid by Lea is $ [tex]240\\[/tex]
Step-by-step explanation:
If a customer buys a computer on Saturday before 9: 00am , the discount applicable will be
[tex]= 30 + 10\\= 40\\[/tex] %
So , the amount paid by Lea if she buys the computer that Saturday before 9:00am
[tex]= (1-\frac{40}{100}) * 400\\= 0.6 * 400\\= 240\\[/tex]