If there are three work elements in a task and the related data about the work elements are as follows, what is the standard time of the task if the direct time study is applied? $($Allowance factor including personal, fatigue and delays is $20\%,$ The average tempo for all work elements is $90\%.).*$The average observed for Work element $1$ is $10$ sec$.*$The normal time for Work element $2$ is $20$ sec$.*$The standard time for Work element $3$ is $30$ sec$.$