Shipping policy

Free Shipping
We offer free standard shipping on U.S. orders of $75 or more before taxes and after discounts. Orders under $75 will be charged the shipping rate shown at checkout.

Then keep the rest of the policy the same.

So your opening can read:

Shipping Policy

Thank you for shopping with A/D Enterprisez Beauty.

We offer free standard shipping on U.S. orders of $75 or more before taxes and after discounts. Orders under $75 will be charged the shipping rate shown at checkout.

We process orders within 2–4 business days, excluding weekends and holidays. Processing time is separate from shipping time.