Rdb: Ruby-Nachbau der MWC /rdb-Werkzeuge

man/tax.man

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+.TH tax "" "" "/rdb Command"
+.PC "Compute tax from income and tax table"
+\fBtax \fIincome \fB< \fItaxtable\fR
+.PP
+.II "table^compute tax"
+The command
+.B tax
+reads tax-table information from
+.I taxtable
+and computes taxes from it.
+.I income
+is the income you wish to check.
+.I taxtable
+must be in the three-column format shown in the following example.
+.PP
+.B tax
+writes to the standard output
+the computed tax rounded off to the nearest dollar.
+.SH Example
+The following table,
+.BR X83 ,
+holds the federal income tax for single taxpayers for 1983 (Schedule X):
+.DM
+income  tax     percent
+------  ---     -------
+2300    0       11
+3400    121     12
+4400    251     15
+6500    566     15
+8500    866     17
+10800   1257    19
+12900   1656    21
+15000   2097    24
+18200   2865    28
+23500   4349    32
+28800   6045    36
+34100   7953    40
+41500   10913   45
+55300   17123   50
+.DE
+.PP
+If your taxable income is $20,000, type the following:
+.DM
+	tax 20000 < X83
+.DE
+.PP
+.B taxtable
+writes the following to the standard output:
+.DM
+   3369
+.DE
+.PP
+That is, according to the data in
+.BR X83 ,
+a single person with an income of $20,000 in 1983 owed the IRS
+$3,369.
+.PP
+You can also catch the output in a shell variable, like this:
+.DM
+	TAX=`tax 20000 < X83`
+.DE
+.PP
+This initializes environmental variable
+.B TAX
+to
+.BR 3369 .
+You can now use
+.B TAX
+to write the tax into a table.
+For example:
+.DM
+	compute "line == 35 { value = $TAX }" < form1040
+.DE
+.PP
+Note that this command
+uses the quotation mark (") instead of the apostrophe ('),
+because we want the shell to substitute the value of tax where we
+have typed $TAX.
+To quote something within quotation marks ("), you
+must use apostrophes (').
+.SH Notes
+Please note that the tax tables included with
+.B /rdb
+are for 1987.
+Mark Williams Company makes no claim as to their accuracy, or their
+usefulness in computing current taxes.
+.I "Caveat utilitor!"