this is really confusing me so I just need a quick clarification:

The product originally cost 2, and then later we were offered extra units of the product for 3 a unit. As far as I'm aware, the shadow price is:

how much would be paid OVER THE ORIGINAL PRICE for one more unit of a scarce resource

The shadow price is calculated 5.75 - so we would be willing to pay 5.75 over the original price (2) for one more unit - does this mean we would definitely take the extra units at 3 a unit, because we would in fact be willing to pay a max of 7.75 for those extra units, so 3 a unit is a good offer?

thanks