First, we need to calculate the discount amount:
Discount = 25% of $150 = 0.25 x $150 = $37.50
The sale price after the discount is the regular price minus the discount:
Sale price = $150 - $37.50 = $112.50
Next, we need to calculate the sales tax on the sale price:
Sales tax = 8% of $112.50 = 0.08 x $112.50 = $9
Finally, we can calculate the total cost including tax:
Total cost = Sale price + Sales tax = $112.50 + $9 = $121.50
Therefore, the total cost including tax for the Blu-ray player is $121.50.