Make sure that you understand the key factors that can bring about a shift in the supply curve for a product in a. A leftward shifts refers to a decrease in demand or supply. Izod 36 X 34 Straight Fit Khakis Khaki Izod Khaki Chinos Please select the best answer. . When the supply curve shifts to the left fewer units will be supplied at each and every price. A change in production or input costs the money spent to manufacture a product as for parts and raw materials will cause a change in supply. View shifts_in_supplypdf from ECON 101 at Shenendehowa High School. A decrease in production or input costs. Learn vocabulary terms and more with flashcards games and other study tools. Shifts in Supply Worksheet Directions. The summer season is approaching and. It means that less is demanded or supplied at each price. Start studying Changes in shifts in Demand and Supply. Following is an example o...