SHHHHH...you've found the secret discount page. Simply apply the below coupon code at time of checkout for the correct amount of your order (they will not work for other amounts).
Orders UNDER $1000 1% discount: OFSU1K1PER
Orders ABOVE $1000 3% discount: OFS1K3PER
Orders ABOVE $2000 4% discount: OFS2K4PER
Orders ABOVE $4000 5% discount: OFS4K5PER
Orders ABOVE $7000 6% discount: OFS7K6PER
Orders ABOVE $10,000 8% discount: OFS10K8PER