I built a small synthetic test of what my pilot delivers: two supplier files (an Excel sheet and a Windows-1252 CSV) with the usual problems. SKUs that lost their leading zeros, prices written as 89,90 / 89.9 / 1.099,00 / €34,95, an exact duplicate, the same SKU with two prices, a size typed as "M/L", and a price "1.099" that could mean either 1,099 or 1.099.