Update understand-usage-details-fields.md

Vikram's feedback incorporated

Author: jojohpm

articles/cost-management-billing/automate/understand-usage-details-fields.md

@@ -181,9 +181,11 @@ Meter characteristics - Meters associated with IQ exhibit specific traits in the
 
 ### Why do we have rounding adjustment?
 
-Every financial system involves rounding logic, which can cause some variance. Invoices will always have rounded figures, while the cost file contains higher precision numbers, resulting in a variance between the two. This variance is the rounding adjustment value, provided at an aggregated invoice level. Whenever an invoice is ready, we include an aggregated rounding adjustment in the cost file. This ensures that the total cost in the cost file, including the rounding adjustment, matches the invoice total. Rounding adjustments are not available in the cost details file during an open month. The adjustment is visible when the month closes, and the invoice is generated.
+Every financial system involves rounding logic, which can cause some variance. Invoices aggregate monthly costs at the meter level, with costs rounded depending on the currency. In contrast, the cost file contains costs at the resource instance level with higher precision. This difference results in a variance in the total cost between the invoice and the cost file. The rounding adjustment is provided in the cost file at an aggregated level whenever the invoice is ready, ensuring that the total costs in both files match.
 
-Customers can distribute the rounding adjustment across smaller granularities like resources, resource groups, or subscription levels using a weighted average or other methods.
+Note: Two separate rounding adjustments are provided—one for first-party records and the other for marketplace records. These adjustments are not available during an open month and become visible when the month closes and the invoice is generated.
+
+Customers can distribute the rounding adjustment across smaller granularities, such as resources, resource groups, or subscription levels, using a weighted average or other methods.
 
 ### Rounding adjustment record in the cost file