The data in the table below represent time study observations for a woodworking operation. $($Hint: See Solved Problems section.$)$

OBSERVATIONS $($minutes per cycle$)$

Element Performance

Rating $123456$

$1110\%1\mathrm{.}201\mathrm{.}171\mathrm{.}161\mathrm{.}221\mathrm{.}241\mathrm{.}15$

$21150\mathrm{.}830\mathrm{.}870\mathrm{.}780\mathrm{.}820\mathrm{.}851\mathrm{.}32*$

$31050\mathrm{.}580\mathrm{.}530\mathrm{.}520\mathrm{.}590\mathrm{.}600\mathrm{.}54$

Click here for the Excel Data File

$*$Unusual delay, disregard time.

a$.$ Based on the observations, determine the standard time for the operation, assuming an allowance of $15$ percent of job time. $($Round your intermediate calculations and final answers to $3$ decimal places.$)\backslash$