When price of inputs (i.e., wages of labour, price of raw materias and fuel) used in the production of a good goes down, the unit cost of production will decline. At a lower cost of production, producers will increase the supply of the commodity, i.e., they would like to sell more quantity of the commodity at a given price. As a result the supply would increase implying that the supply curve will shift to the right.
The diagam illustrates the effect:
Effect of a fall in the price of inputs In the diagram, the supply curve of a good is shown by SS curve.
With the fall in the price of inputs, the quantity supplied of the good rises from OQ to
OQ1 at the same price. The supply curve shifts rightward from SS to
S1S1.