fixed calculations

src/pipelines.py

@@ -94,7 +94,8 @@ class InvoiceGenerator:
         lines = generated_invoice.split("\n")[first_cost_line:last_cost_line]
         cost_lines = [[line.strip() for line in cost_line.split("|")] for cost_line in lines]
         print(f"Cost lines: \n{cost_lines}\n")
-        costs = [int(line[1]) + int(line[2]) * int(line[3]) for line in cost_lines]
+        start_index = 1 if cost_lines[0][0] != "" else 2
+        costs = [int(line[start_index]) + int(line[start_index + 1]) * int(line[start_index + 2]) for line in cost_lines]
         cost_lines = list(map(lambda x, y: [x[0], x[1], x[2], x[3], str(y)], cost_lines, costs))
         total_cost = sum(costs)
         total_cost_line = re.sub(r"\d+", f"{total_cost}", total_cost_line)