In case 1, the rise in price of electricity will increase total cost and this is expected to reduce profit. Hence, the supply is affected and so the supply curve shifts left. There is an increase in price but a decline in quantity.
In case 2, price of substitute is reduced which helps consumers to switch to cheaper substitute. This decreases the demand at Bert's Bowling Bonanza and so the demand curve shifts to the left. Price is reduced and at the same time quantity is decreased as well.
M S Subs and Bere's owing versions toge Sved Consider the market for bowling at Bert's...