- Pay Foxy 903k on the q 195 BNG, and then craft a run of 11`395 * 1.95 + 23 * 152 * 1.41 + 2`515 + 339xv = 30`003 ECu in with 14`587 * 1.3 = 18`963 ECu out for an overcraft of 11`039 each click for 26 clicks

- Or else not pay Foxy the 903k, and instead do a craft run of 11`395 * 1.5 + 23 * 152 * 1.41 + 2`515 + 339 = 24`875 ECu in with the same 14`587 * 1.3 = 18`963 ECu out for an overcraft of 5`912 ECu for however many clicks it takes to deliver the same results as above ?

This in turn changes the later figures,

If we believe that overcraft is fungible, to wit that 26 * 11`039 = 287`014 ECu worth of overcraft made through the first option is the same as 48.5 * 5`912 = 286`732 ECu worth of overcraft made through the second option, it then comes to compare the cost of paying Foxy 903k as well as to pay for 23 * 26 = 598 bits of Worthless Putrid Leather with the cost of buying 48.5 bottles of BNG as well as 23 * 48.5 = 1`115.5 WPL, (ie an extra 517.5), plus the decay of tool and workbench involved in doing an extra (48.5 - 26) = 22.5 clicks. As it happens the leather goes at 130%, has a base value of 152 and a quality of 141, so we can readily know that the extra leather costs us 144`183 ECu. The tool and bench are a little iffier, but going by a rough 200% approximation we'd be spending a further (2515 + 339) * (48.5 - 26) * 2 = 128`430 ECu there. The question then becomes : is saving on 48.5 BNG worth an expenditure of 903`000 - 144`183 - 128`430 = 630`387 ECu, or 12`997 per bottle ? As it happens that BNG bottles have a base value of 11`395 and considering the quality they'd be required at and what prices look like of late, it'd be a wonder if we could make them for less than 25k each.

As you can see the numbers look a little better for 2nd option, but still not really good enough.