Find the total amount of interest paid throughout the loan? Here's what I found for monthly payments and unpaid balance for the first 12 months. $300, $4700 $297, $4403 $294.03, $4109.97 $291.09, $3817.88 $288.18, $3529.70 $285.30, $3244.40 $282.44, $2961.96 $279.62, $2682.34 $276.62, $2682.34 $271.31, $1860.14 $268.60, $1591.54 How do I find the amount of total interest paid for the WHOLE loan? Thank you for the help.

Question

Find the total amount of interest paid throughout the loan? 

Here's what I found for monthly payments and unpaid balance for the first 12 months.

$300, $4700
$297, $4403
$294.03, $4109.97
$291.09, $3817.88
$288.18, $3529.70
$285.30, $3244.40
$282.44, $2961.96
$279.62, $2682.34
$276.62, $2682.34
$271.31, $1860.14
$268.60, $1591.54

How do I find the amount of total interest paid for the WHOLE loan? Thank you for the help. ><