I need a good explanation of all the costs ________ in buying a new car.    affected    involved    concerned    implied

The correct word to fill in the blank is "involved".

So the sentence should read: "I need a good explanation of all the costs involved in buying a new car."

Here's why:

1. "Affected" is not the correct word because it implies that the costs are being changed or influenced by buying a new car, which is not the case. The costs are a part of the process, not something external that is being influenced.

2. "Involved" is the correct word because it means that the costs are a part of the process of buying a new car. They are included or necessary in the process.

3. "Concerned" is not the correct word because it implies worry or anxiety. Costs don't have feelings, so they can't be concerned.

4. "Implied" is not the correct word because it suggests that the costs are suggested but not explicitly stated. In the context of buying a new car, the costs are usually very explicit and clear.

So, when you're talking about the costs that come with buying a new car, you would say they are the costs "involved".