Final answer:
Tech Pro has the better sale price and Glenn would save $98.85.
Step-by-step explanation:
To compare the sale prices at Tech Pro and Office Zone, we need to calculate the discounted price for each store. At Tech Pro, the laptop is discounted by 15%, so the price after the discount is $659 - ($659 * 0.15) = $560.15. At Office Zone, the laptop is discounted by 20%, so the price after the discount is $709 - ($709 * 0.20) = $567.20.
Therefore, the better sale price is at Tech Pro, where Glenn would save $659 - $560.15 = $98.85 compared to the original price.