Update README.md

Author: atsyplenkov

README.md

@@ -120,7 +120,7 @@ Another example of a table that was parsed incorrectly from a paper is shown bel
 
 ## Cost (Rough Estimate)
 
-The tool records token usage in `log.jsonl` under the `usage` field. With pricing at `$0.03` per `1,000,000` tokens (both input and output), processing an average-sized scientific paper like [Batista et al., 2022](https://hess.copernicus.org/articles/26/3753/2022/) with `total_tokens = 79,080` costs approximately `$0.0023724`. This is about 0.24 cents per article.
+The tool records token usage in `log.jsonl` under the `usage` field. With pricing at `$0.03` per `1,000,000` tokens (both input and output), processing an average-sized scientific paper like [Batista et al., 2022](https://hess.copernicus.org/articles/26/3753/2022/) with `total_tokens = 79,080` costs approximately `$0.0023724`. This is about **0.24 cents** per article.
 
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