Final answer:
Hasina's total credit note for the two faulty radios is $20, which includes the trade discount but excludes the cash discount.
Step-by-step explanation:
Firstly, we calculate the total cost of 12 radios without any discounts:
Cost of 12 radios = 12 × $10 = $120
Next, we apply the 20% trade discount:
Trade discount = 20% of $120 = 0.20 × $120 = $24
Subtracting the trade discount from the initial cost gives us:
Cost after trade discount = $120 - $24 = $96
Now, Hasina is also offered a 4% cash discount, but since two radios are faulty and returned, we apply the cash discount only on the remaining 10 radios:
Cost of 10 radios after trade discount = $96 - ($10 × 2) = $76
Cash discount = 4% of $76 = 0.04 × $76 = $3.04
Finally, the total cost after both discounts is:
Total cost after all discounts = $76 - $3.04 = $72.96
The credit note issued for the two faulty radios would consider the cost after the trade discount only, excluding the cash discount:
Cost of two radios after trade discount = $10 × 2 = $20
Therefore, the total of the credit note issued by Nazneen for the two faulty radios is $20.