PLEASE HELP ILL FAIL

you have come to the right place

Step-by-step explanation:

to complete the table it would be

Cost:   | Total Cost |

1.50    |     2.50      |

2.50   |     4.50      |

 3.00  |    5.00       |

here you go

Step-by-step explanation:

Cost:   | Total Cost |

1.50    |     2.50      |

2.50   |     4.50      |

3.00  |    5.00       |