PLS MY EMAIL IS firstname.lastname@example.org
The shadow price is the cost of producing an extra unit where there is a binding constrain. I.e. If a company is limited to produce 500 units and produces 501 units, the shadow price would be the cost of producing the extra 1.
To calculate your shadow price, add one extra unit to the contribution maximizing combination of units to be produced. Then deduct the previous total cost of say (500units) from the total cost of (501 units) the difference, is your shadow price.