Queries :: Manifest - Query A List And Then Show Only Unique Values

One Manifest can have many line items. One line item can only have 1 designation. Each manifest may have many line item with same designations.

For example:
Manifest #0001
Line Item 1: N
Line Item 2: H
Line Item 3: U
Line Item 4: N
Line Item 5: P
Line Item 6: H

Table set-up
CurrentCY
CurrentCYIDPK
WasteCategoryIDFK
LineItemInformation [Line Item 1, Line Item 2, etc]
ManifestDataIDFK

ManifestData
ManifestDataIDPK
ManifestNumber [0001]

WasteCategory
WasteCategoryIDPK
WasteCategory [H, N, U, etc]

I'd like to query the line items for each manifest so the end result has the manifest number (Manifest #0001) in a field and the designations (N, H, P, U) in fields on a report.