Answer:
$51.43
Step by step solved:
First, let's calculate the total cost of Saul's purchases before any discounts or taxes:
Total cost = $45 (cologne) + $10 (tie) = $55
Next, let's calculate the discount that Saul gets on his purchases:
Discount = 15% of $55 = 0.15 x $55 = $8.25
Now, let's subtract the discount from the total cost to find the subtotal:
Subtotal = $55 (total cost) - $8.25 (discount) = $46.75
Finally, let's calculate the sales tax on the subtotal:
Sales tax = 10% of $46.75 = 0.10 x $46.75 = $4.68
Therefore, Saul pays a total of:
Total cost = Subtotal + Sales tax
Total cost = $46.75 (subtotal) + $4.68 (sales tax) = $51.43
So Saul pays a total of $51.43 for his purchases including sales tax.