The following table gives hypothetical annual total costs and total benefits of maintaining alternative populations of Asian elephants.

Calculate the marginal costs of maintaining alternative elephant populations in the table below. $($Enter numeric responses using integers.$)$

Calculate the marginal benefits of maintaining alternative elephant populations in the table below.

$\backslash$table$[[\backslash$table$[[$Population of$],[$Asian Elephants$]],\backslash$table$[[$Total Cost $($$$],[$millions$)]],$Marginal Cost,$\backslash$table$[[$Total Benefit $($$$],[$millions$)]],\backslash$table$[[$Margina$],[$Benefit$]]],[\backslash$table$[[\backslash$table$[[0],[7,500]]]],\backslash$table$[[\backslash$table$[[0],[45]]]],-,\backslash$table$[[\backslash$table$[[40],[115]]]],-],[15,000,95,,185,],[22,500,150,,250,],[30,000,210,,310,],[37,500,275,7,365,],[45,000,345,7,415,$