If you want to sabotage a certain percentage of the resource, it could be 1% = $ 1000 for 100 resources, 1%= 2000 for 200 so on x by how covert the operation is (1,1.5,2) plus operation costs of how covert it is + average price of resource on market divided by 2 x how much you are stealing. So it would be like this
Tx1000xC+U+Y Y=I/2xM T=M
T=percentage of resource
C=what type of operation you are doing(quick and dirty, normal precautions, etc)
U=costs of (quick and dirty, normal precautions,etc)
Y=cost of avg price of resource on market/2
I=cost of avg price of resource on market
M=how much you are stealing
I believe T and M would be equal
Make changes if you like sheepy, the variable C might not be nessisary.