No shipping costs at all

Using this setup with four products in cart every product is in the class ‘flyer’, no shipping costs.

100|0|flyer
500|4|flyer
1000|6|flyer
1500|6|flyer
2000|8|flyer
2500|10|flyer
3500|12|flyer
4000|14|flyer
4500|16|flyer
5000|18|flyer
5500|20|flyer
6500|22|flyer
7000|24|flyer
7500|26|flyer
8500|28|flyer
9000|30|flyer
9500|32|flyer
10000|34|flyer
1|0
80|2
485|3|0x0x19
485|9|0x0x2000
1900|9
4800|11
9700|12
19500|17
29000|24

Peso total: 12500
Volumen: 0
Largo: 0
Ancho: 0
Alto: 0.5
Medidas: Array
(
    [0] => Array
        (
            [largo] => 
            [ancho] => 
            [alto] => 
            [cantidad] => 101
        )

    [1] => Array
        (
            [largo] => 
            [ancho] => 
            [alto] => 0.5
            [cantidad] => 100
        )

    [2] => Array
        (
            [largo] => 
            [ancho] => 
            [alto] => 0.5
            [cantidad] => 100
        )

    [3] => Array
        (
            [largo] => 
            [ancho] => 
            [alto] => 0.5
            [cantidad] => 100
        )

)

Clases: Array
(
    [todas] => 12500
    [flyer] => 12500
)
Tarifas: Array
(
    [flyer] => Array
        (
            [0] => Array
                (
                    [peso] => 100
                    [importe] => 0
                )

            [1] => Array
                (
                    [peso] => 500
                    [importe] => 4
                )

            [2] => Array
                (
                    [peso] => 1000
                    [importe] => 6
                )

            [3] => Array
                (
                    [peso] => 1500
                    [importe] => 6
                )

            [4] => Array
                (
                    [peso] => 2000
                    [importe] => 8
                )

            [5] => Array
                (
                    [peso] => 2500
                    [importe] => 10
                )

            [6] => Array
                (
                    [peso] => 3500
                    [importe] => 12
                )

            [7] => Array
                (
                    [peso] => 4000
                    [importe] => 14
                )

            [8] => Array
                (
                    [peso] => 4500
                    [importe] => 16
                )

            [9] => Array
                (
                    [peso] => 5000
                    [importe] => 18
                )

            [10] => Array
                (
                    [peso] => 5500
                    [importe] => 20
                )

            [11] => Array
                (
                    [peso] => 6500
                    [importe] => 22
                )

            [12] => Array
                (
                    [peso] => 7000
                    [importe] => 24
                )

            [13] => Array
                (
                    [peso] => 7500
                    [importe] => 26
                )

            [14] => Array
                (
                    [peso] => 8500
                    [importe] => 28
                )

            [15] => Array
                (
                    [peso] => 9000
                    [importe] => 30
                )

            [16] => Array
                (
                    [peso] => 9500
                    [importe] => 32
                )

            [17] => Array
                (
                    [peso] => 10000
                    [importe] => 34
                )

        )

    [sin-clase] => Array
        (
            [0] => Array
                (
                    [peso] => 1
                    [importe] => 0
                )

            [1] => Array
                (
                    [peso] => 80
                    [importe] => 2
                )

            [2] => Array
                (
                    [medidas] => 0x0x19
                    [peso] => 485
                    [importe] => 3
                )

            [3] => Array
                (
                    [medidas] => 0x0x2000
                    [peso] => 485
                    [importe] => 9
                )

            [4] => Array
                (
                    [peso] => 1900
                    [importe] => 9
                )

            [5] => Array
                (
                    [peso] => 4800
                    [importe] => 11
                )

            [6] => Array
                (
                    [peso] => 9700
                    [importe] => 12
                )

            [7] => Array
                (
                    [peso] => 19500
                    [importe] => 17
                )

            [8] => Array
                (
                    [peso] => 29000
                    [importe] => 24
                )

        )

)