Reference | Sub reference |

Ahmed | 6 |

Mourad | 11 |

Ahmed | 6 |

Ahmed | 6 |

Ahmed | 7 |

Saleem | 5 |

Saleem | 5 |

Count of Unique cases | ?? |

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In the table I have there are other data and other formulas therefore data filter and remove duplicates would not work, I need to use a formula for this.

I appreciate your help.