How do I obtain the "lot price"?

Thanks for any help you can give me. *Question about Report Format String*The "lot price" (the price of one share) is shown in curly braces by the format string parameter %(amount). But I have been unable to obtain just the "lot price" using a format string parameter. I suspect that

Sorting on multiple keys and Sort Stability

The ledger sort is *NOT* "stable". A sort is "stable" iff when multiple records have the same key, their original order is preserved. Consequently, I can't use the ledger sort to achieve sorting on multiple keys. When I convert my GnuCash file to Ledger, the transactions are in random order.