Answer:
Price will not change
Explanation:
A perfectly competitive market is a market where there are many firms that produce and sell similar products, no barriers to entry and exist, all firms are price takers and none of the firms is big enough or has the power to influence the market or change the price in the market.
The implication is that a firm can decide to increase its output to any level in perfectly competitive market market, but this increased out can only be sold at the market price which it has no power to change.
Therefore, if Glass Inc. Glass Inc. increases production to 120 window panes from 80, the price will still remain at $60, every other thing remain constant.
I wish you the best.
