reacting to a security incident
Yes, it is. It is the comparative form of the adjective costly (i.e. more costly).
it is more costly to mine because you have to get scuba gear and mining stuff.
yes it is costly, accurately and timeously
Costly. "Extravagant" suggests that the object is not worth the price.
laptops are more expensive.
Replacing a transmission is more costly, rebuilding a transmission is the least costly. Either way make sure you go to a reputable shop and get a guarantee for the replacement or rebuild.
There are many reasons why car dealer financing is more costly than getting a loan from the bank. It is more costly because car dealers are usually in the business of making large amounts of money.
It is more costly to hire a home construction team to build you a home.
Well, items are mainly costly because our money is going up and we have a financial crisis....
Both the War of Independence and the Yom Kippur War were much more costly to Israel that the Six Day War.
stainless steel
I suppose that the preparation procedure is more difficult.