-more than once which case we calculate the differences and the profit
-for each one.
-
-If /<shot> is not specified at all, relevant information about shot is
-not reported. For have and want, specifying an empty string means
-zero. Entirely Missing <swill>/<grog>/ is taken as if both were
-specified and zero.
-
-In price, missing entries mean the commodity is unavailable.
+more than once which case we calculate the financial implications
+at each stage.
+
+Missing entries count as zero (and zeroes are not displayed in the output).
+In price, \`x' means the commodity is unavailable.
+
+The intended use is that at the start of the pillage you run:
+ ypp-restock-rum have ... want ...
+to check that stocks are sufficient, or perhaps:
+ ypp-restock-rum have ... want ... price ...
+if you want to stock up some more. At the end of the pillage,
+run the same thing again with some extra parameters:
+ ypp-restock-rum have .. want ... have ... price ...
+and it will tell you how you did and what the restock should be like.