Your Cart Product Price Total RentalThe Circulatory System, Part 1 $9 / 2 days $9 / 2 days cancel RentalAcids and Bases, Part 1 $9 / 2 days $9 / 2 days cancel RentalSubstitution and Elimination Reactions $9 / 2 days $9 / 2 days cancel RentalLipids $9 / 2 days $9 / 2 days cancel Cart totals Subtotal $36 Total $36 — OR — Proceed to checkout