Why does the cost seem to be higher?

Why do estimates seem to be getting more expensive? LUMBER PRICES HAVE GONE UP MORE THAN 180% due to the pandemic causing a shortage. Many contractors are already cutting their prices to stay in business.

https://nebldgsupply.com/strong-demand-and-tight-supply-have-caused-lumber-prices-to-soar/

https://www.google.com/amp/s/fortune.com/2021/03/20/lumber-prices-2021-chart-when-will-wood-shortage-end-price-of-lumber-go-down-home-sales-cost-update-march/amp/

https://www.google.com/amp/s/www.theadvocate.com/baton_rouge/news/business/article_21d6dee6-e313-11ea-881d-1bff08173b5f.amp.html