The exported file uses the columns STOCK NUMBER, DESCRIPTION, LAST COST, SELLING PRICE, MIN ON HAND, QTY ON HAND, CARTON QTY, MARKUP AMOUNT, PREMIUM AMOUNT, and TAXABLE. Parts are grouped by category, with the category name on its own row and a blank row separating one category from the next. Keep that layout, including the headers and the blank rows, or ARM cannot match the parts to their categories on import.
For a first-time load, send your file to ARM support and let us run the import instead — it avoids format errors and saves you entering every part, cost, price, and quantity by hand.