IF(
  OR({Package Quantity} > 0, {NUMBER OF Items} > 0),
  MAX({Package Quantity}, {NUMBER OF Items}),
  IF(
    OR(
      REGEX_MATCH({Amazon Title}, "(?i)\\b(\\d{1,2})[ -]?pack\\b"),
      REGEX_MATCH({Amazon Title}, "(?i)\\b(\\d{1,2})[ -]?pk\\b"),
      REGEX_MATCH({Amazon Title}, "(?i)pack of (\\d{1,2})\\b"),
      REGEX_MATCH({Amazon Title}, "(?i)packs of (\\d{1,2})\\b"),
      REGEX_MATCH({Amazon Title}, "(?i)multi[-]?pack of (\\d{1,2})\\b"),
      REGEX_MATCH({Amazon Title}, "(?i)case of (\\d{1,2})\\b"),
      AND(
        REGEX_MATCH({Amazon Title}, "(?i)(\\d{1,2}) piece[s]?\\b"),
        NOT(REGEX_MATCH({Amazon Title}, "(?i)\\bset\\b"))
      ),
      REGEX_MATCH({Amazon Title}, "\\((\\d{1,2})\\)"),
      REGEX_MATCH({Amazon Title}, "(?i)\\b(\\d{1,2})ct\\b"),
      REGEX_MATCH({Amazon Title}, "(?i)(\\d{1,2}) ?[xX] ?packs?\\b"),
      REGEX_MATCH({Amazon Title}, "(?i)x (\\d{1,2}) packs?\\b"),
      REGEX_MATCH({Amazon Title}, "(?i)total[-]?(\\d{1,2})[-]?packs?\\b")
    ),
    VALUE(
      IF(
        REGEX_MATCH({Amazon Title}, "(?i)\\b(\\d{1,2})[ -]?pack\\b"),
        REGEX_EXTRACT({Amazon Title}, "(?i)\\b(\\d{1,2})[ -]?pack\\b"),
        IF(
          REGEX_MATCH({Amazon Title}, "(?i)\\b(\\d{1,2})[ -]?pk\\b"),
          REGEX_EXTRACT({Amazon Title}, "(?i)\\b(\\d{1,2})[ -]?pk\\b"),
          IF(
            REGEX_MATCH({Amazon Title}, "(?i)pack of (\\d{1,2})\\b"),
            REGEX_EXTRACT({Amazon Title}, "(?i)pack of (\\d{1,2})\\b"),
            IF(
              REGEX_MATCH({Amazon Title}, "(?i)packs of (\\d{1,2})\\b"),
              REGEX_EXTRACT({Amazon Title}, "(?i)packs of (\\d{1,2})\\b"),
              IF(
                REGEX_MATCH({Amazon Title}, "(?i)multi[-]?pack of (\\d{1,2})\\b"),
                REGEX_EXTRACT({Amazon Title}, "(?i)multi[-]?pack of (\\d{1,2})\\b"),
                IF(
                  REGEX_MATCH({Amazon Title}, "(?i)case of (\\d{1,2})\\b"),
                  REGEX_EXTRACT({Amazon Title}, "(?i)case of (\\d{1,2})\\b"),
                  IF(
                    AND(
                      REGEX_MATCH({Amazon Title}, "(?i)(\\d{1,2}) piece[s]?\\b"),
                      NOT(REGEX_MATCH({Amazon Title}, "(?i)\\bset\\b"))
                    ),
                    REGEX_EXTRACT({Amazon Title}, "(?i)(\\d{1,2}) piece[s]?\\b"),
                    IF(
                      REGEX_MATCH({Amazon Title}, "\\((\\d{1,2})\\)"),
                      REGEX_EXTRACT({Amazon Title}, "\\((\\d{1,2})\\)"),
                      IF(
                        REGEX_MATCH({Amazon Title}, "(?i)\\b(\\d{1,2})ct\\b"),
                        IF(
                          VALUE(REGEX_EXTRACT({Amazon Title}, "(?i)\\b(\\d{1,2})ct\\b")) > 20,
                          "1",
                          REGEX_EXTRACT({Amazon Title}, "(?i)\\b(\\d{1,2})ct\\b")
                        ),
                        IF(
                          REGEX_MATCH({Amazon Title}, "(?i)(\\d{1,2}) ?[xX] ?packs?\\b"),
                          REGEX_EXTRACT({Amazon Title}, "(?i)(\\d{1,2}) ?[xX] ?packs?\\b"),
                          IF(
                            REGEX_MATCH({Amazon Title}, "(?i)x (\\d{1,2}) packs?\\b"),
                            REGEX_EXTRACT({Amazon Title}, "(?i)x (\\d{1,2}) packs?\\b"),
                            IF(
                              REGEX_MATCH({Amazon Title}, "(?i)total[-]?(\\d{1,2})[-]?packs?\\b"),
                              REGEX_EXTRACT({Amazon Title}, "(?i)total[-]?(\\d{1,2})[-]?packs?\\b"),
                              "1"
                            )
                          )
                        )
                      )
                    )
                  )
                )
              )
            )
          )
        )
      )
    ),
    1
  )
)