Answer: The final cost of the markers including sales tax is $30.24
Step-by-step explanation: Miss Rose bought 8 packages of markers that cost $3.50 each, so the total cost of the markers before tax was:
8 x $3.50 = $28.00
To find the cost after the 8% sales tax, we need to add 8% of the original cost to the original cost:
8% of $28.00 = 0.08 x $28.00 = $2.24
Adding the sales tax to the original cost gives:
$28.00 + $2.24 = $30.24