Proozy offers the Reebok Men's Knit Lounge Pants in several colors (Dark Charcoal Heather pictured) for $19.99. Add two pairs to cart for $39.98 and apply coupon code "DN24" to drop that to $24. With free shipping, that's the lowest price we could find for this quantity by $8. (We saw single pairs for $13 each last week.) They're available in select sizes from S to XL.
Vinegar is arguably the most versatile product in your house. If you aren't using it for all of these purposes, you're probably wasting money.