I'm not sure what item 3 is.  Other than that:

Sling Hook       1       3.40    3.40
Sling    1       32.00   32.00
Mat      2       62.00   124.00
Kneeling Roll    1       24.00   24.00
Stativ   1       150.00  150.00
50m Patches      1       24.47   24.47
Subtotal                        357.87
Discount                -10%     -35.79
Total                   322.08

How does that sound?

Regards

Donald