You can link a rate card to a line item code's Custom Prices section:
- Navigate to Order Setup > Line Item Codes.
- Select the desired line item code and click the Edit button.
- Click the Custom Prices tab.
- Specify the desired rate card:
- Click in the Rate Card field and type the rate card code.
- Click the single-line selector to select and link a single rate card.
- Click the group-level selector to select and link multiple rate cards at one time.
- Click Save.