How much did paper cost in 105 AD?

In 105 AD, paper as we know it today had just been invented in China by Cai Lun. However, the cost of this early paper is not well-documented, and it was likely more expensive than modern paper due to its labor-intensive production process. At that time, it was primarily used by scholars and officials, making it a luxury item rather than a common commodity. The exact cost in terms of currency is unknown, but it would have been significantly higher than other writing materials like bamboo strips or silk.