Answer:
$12
Step-by-step explanation:
Stand alone sale price = (Cost of chair) * (Discount % of voucher-Normal% of discount) * (% of coupons to be utilized)
Stand alone sale price = $150 * (50%-10%) * 20%
Stand alone sale price = $150 * 40% * 20%
Stand alone sale price = $12
Therefore, the Stand alone selling price used by Gore Inc. is $12