Working 03 · Compare like amounts
Read your oath peptides discount against the subtotal.
Use the worksheet to estimate a merchandise reduction, then compare it with the amount checkout actually accepts. Begin with the eligible subtotal. A larger total that includes postage or tax won’t give you the same comparison.
- Read the merchandise amount at the shop. Go to the Oath Research homepage. On October 19, 2026, it said registration is required to browse the catalog. The shop sells research-use-only peptides. Read the basket’s eligible merchandise subtotal in your account, leaving tax and freight aside for the moment.
- Put that amount in the savings field. The worksheet begins with a hypothetical $120. Replace it with your eligible subtotal; both result lines stay visible. GRANT takes 20% off for new customers on their first order only. GRANT15 takes 15% off for everyone. There’s no minimum, and it applies to repeat orders.
- Copy one eligible code and apply it. Select the text if the Copy button isn’t available on your device. Paste it into the shop’s coupon field and apply it there. The worksheet only does arithmetic; entering a number here doesn’t add merchandise or place an order.
- Compare the accepted reduction. On the hypothetical $120 example, the separate savings are $24 and $18. Compare the shop’s discount with the matching result for your subtotal. Then read tax, freight and the amount due separately. The worksheet doesn’t decide whether you qualify for free shipping.
When the numbers don’t agree.
First check that the eligible merchandise amounts match. Then check the code’s spelling and eligibility. If this isn’t your first order, compare the everyone code instead. We don’t have confirmation that the codes combine with each other or with the shop’s new-account offer.
If a code is rejected or the difference is unclear, keep the displayed message and ask Oath Research before paying. The August 13, 2026 support record lists +1 480-999-1097 and a stated response time of 24–48 hours. The contact form requires an account. Don’t count on a missing discount being added after the order.
For a difference of a cent, compare the rounding as well as the starting amount. The rounding note explains how the worksheet handles cents. For shipping, read the actual charge alongside the before-and-after explanation.