Abundled computer package costs $760.50. there is an 8 percent convenience fee for assembling the package. how much will the computer cost, with assembly?

So we need to find 8% of 760.50 then add it to the original cost of the computer package. 
To find 8%, multiply like what is below. 

$760.50 × .08 = 60.84
$60.84 is 8% of $760.50
Add both totals together to get the cost of the computer, with assembly

$821.34