Choose all that correctly compute the total cost, including the discount and tax. (round to the nearest hundredth)
25% off $39.25, and an 8% sales tax
total cost = $31.79
20% off $66.75, and an 8% sales tax
total cost = $57.67
40% off $45.90, and an 8.5% sales tax
total cost = $29.88
10% off $22.75, and a 7.5% sales tax
total cost = $20.10