12-03-2017
Assuming that the last field in your data is a number of units of that recipe item, are you looking for the highest unit price (e.g. $2.98 for pumpkin pie filling), or are you looking at the highest price based on the unit price and quantity (e.g., $4.45 for 5 potatoes)?
If the latter, it is unfortunate that grep doesn't do arithmetic and that bash doesn't perform floating point calculations. Are you supposed to be learning how to use awk?
Most versions of the sort utility since about 1990 have two ways of specifying which ranges of characters on an input line are to be used as a sort key. Many people (apparently including you) found the old way (+key_start_spec -key_end_spec) confusing. Please look at your system's man page for sort (i.e. issue the command man sort) and look for the -k keydef option description and see if you can more easily specify the unit price field to be used as the sort key. You might also want to look for an option (or keydef flag to reverse the sort order if you want the highest values first instead of last. Note that if you want to sort on two fields, you need to sort keys. For example, if you want to sort with unit prices as the primary key and quantity as the secondary key, you need to use the 3rd field as your primary key and the 4th field as your secondary key. Using the 3rd and 4th fields together as a single sort key won't give you the results you want when sorting numeric fields.
While you're looking at man pages, you might also want to investigate what the head and tail utilities do.
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LEARN ABOUT OPENSOLARIS
script
script(1) User Commands script(1)
NAME
script - make record of a terminal session
SYNOPSIS
script [-a] [filename]
DESCRIPTION
The script utility makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
record is saved in the file typescript. See WARNINGS.
The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
when the forked shell exits or when Control-d is typed.
OPTIONS
The following option is supported:
-a Appends the session record to filename, rather than overwriting it.
NOTES
script places everything that appears on the screen in filename, including prompts.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|CSI |Enabled |
+-----------------------------+-----------------------------+
SEE ALSO
attributes(5)
WARNINGS
script can pose a security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
privileged user, that is, root. Be sure that typescript is not a link before running script.
SunOS 5.11 30 Jan 2004 script(1)