Answer:
$285,000
Step-by-step explanation:
Interest paid in cash = $300,000 *10%*10 years
Interest paid in cash = $300,000
Premium received = $300,000/100*5
Premium received = $15,000
Net interest expense in life of bonds = Interest paid in cash - Premium received
Net interest expense in life of bonds = $300,000 - $15,000
Net interest expense in life of bonds = $285,000