Summary of the 2021 financial statements Overall, 2021 is a concentrate of investments for the coming years. Isolating the most important metrics for 2021-Q4, we can see a record tonnage processed in the fourth quarter; the best gold production of the last 7 quarters; an operating cost per tonne processed down 15.78% and finally, 3 months were enough to increase cash flow by $16 million. This financial performance was achieved despite a correction in taxes payable and the increase in the cost of chemicals and petroleum products. The steam was reversed in December and will be confirmed in 2022.
The financial performance of the last quarter combined with the numerous investments on the Nampala operating site will help ensure long-term stability of operations and revenues. Consequently, many works are already underway on the Kiniero and Mansounia permits, while work has also resumed on our Gladie, Mininko, Kamasso, Diangounte and Sanoula permits.
Regarding bank loans and the line of credit, the total is still below $10 million, an increase of $4 million. In summary, Robex has succeeded in increasing its cash flow in 2022, financing its numerous investments from its working capital and using the flexibility offered by the use of a line of credit for its day-to-day operations. At the end of 2022, total bank loans will be less than $500,000. In other words, Robex could reimburse all of its debts with its cash and the balance would still be positive.
In summary, the financial balance sheet is solid and the future profits will be more than enough to finance the many projects of Robex.