WooCommerce Addition Item Cost

Hi All,

I’m in desperate need to find a plugin for WooCommerce that will allow for Addition Item Costs. So for example:

1 x Item A = $10
2 x Item A = $10 + $5
3 x Item A = $10 + $10
4 x Item A = $10 + $15

1 x Item B = $12
2 x Item B = $12 + $6
3 x Item B = $12 + $12
4 x Item B = $12 + $18

1 x Item C = $3
2 x Item C = $3 + $9
3 x Item C = $3 + $18
4 x Item C = $3 + $27

and so on with each addition item adding an extra $X to the original $X cost.