So basically, your shipping table looks like:
1 bag - $5
2 bags - $9
3 bags - $11
4 bags - $13
.
.
100 bags - $205
Say, if your bag costs $2, then the shipping table becomes
For a $2 order, shipping is $5
For a $4 order, shipping is $9
For a $6 order, shipping is $11
.
.
For a $200 order, shipping is $205
Now, in Admin > Shipping Settings, set weight and price of all packaging elements to 0, remove your zipcode and in the handling field enter $205.
This will basically set a flat shipping of $205 for all your orders. Since we don't want that, you should go to Admin > Cart Discounts.
Add the following discounts:
For a min. $2 order, add a 97.56% shipping discount.
note: to calculate the percentage -> (($205-$5)/$205)*100
For a min. $4 order, add a 95.60% shipping discount
note: to calculate the percentage -> (($205-$9)/$205)*100
For a min. $6 order, add a 94.63% shipping discount
.
.
For a min. $200 order, add a 0% shipping discount.
Hope this makes sense