"The cost to buy a car or building materials are up by as much...

"The cost to buy a car or building materials are up by as much as 40%"

Do try some research before posting.

The rise in US car & timber prices was a function of lock downs. No body was buying cars or cutting timber so prices that dropped have now risen.

"‘Severe lumber shortage’ is adding $14,000 to the cost of a new home"

https://fortune.com/2020/08/31/severe-lumber-shortage-real-estate-new-home-cost/

"Inflation speeds up in April as consumer prices leap 4.2%, fastest since 2008

One big reason for the acceleration was base effects – at this time a year ago, the economy was hit with the worst of the Covid pandemic and inflation was unusually low.

Used car and truck prices, which are seen as a key inflation indicator, surged 21%, including a 10% increase in April alone. Shelter, another key CPI component, was up 2.1% year over year and 0.4% for the month.

In addition to rising prices, one of the main reasons for the big annual gain was because of base effects, meaning inflation was very low at this time in 2020 as the Covid pandemic caused a widespread shutdown of the U.S. economy. Year-over-year comparisons are going to be distorted for a few months because of the pandemic’s impact."

https://www.cnbc.com/2021/05/12/consumer-price-index-april-2021.html