Source: U.S. Census Bureau  

Release: Monthly Wholesale Trade: Sales and Inventories  

Units:  Millions of Dollars, Seasonally Adjusted

Frequency:  Monthly, End of Month

Notes:

Definition of inventories (as provided by the Census Bureau): The value, at cost, of merchandise on hand and available for sale at the end of the reference month. All goods owned by a firm, regardless of location, except goods outside the United States are included. Items not held for resale, such as fixtures, equipment, and supplies are excluded. Also excluded is the value of goods on a firm's premises but not owned by the firm. (http://www.census.gov/wholesale/definitions.html)
This series represents monthly statistics of complete coverage. The advance estimate of the current month and revised estimate of the prior month of nearly complete coverage is available on FRED at https://fred.stlouisfed.org/series/AMINVTS

Source: U.S. Census Bureau  

Release: Manufacturing and Trade Inventories and Sales  

Units:  Ratio, Seasonally Adjusted

Frequency:  Monthly, End of Period

Notes:

The inventories to sales ratios show the relationship of the end-of-month values of inventory to the monthly sales. These ratios can be looked at as indications of the number of months of inventory that are on hand in relation to the sales for a month. For example, a ratio of 2.5 would indicate that wholesalers have enough merchandise on hand to cover two and a half months of sales.

Source: U.S. Census Bureau  

Release: Manufacturing and Trade Inventories and Sales  

Units:  Millions of Dollars, Seasonally Adjusted

Frequency:  Monthly