Write the SQL code to generate the total hours worked and the total charges made by all employees. The results are shown in Figure P$7\mathrm{.}8.$

R$.$ Result for total hours and charges for all employees is displayed under columns, sum of ASSIGN underscore hours, $90\mathrm{.}6$ and sum of ASSIGN underscore charge, $7612\mathrm{.}64.$

Figure P$7\mathrm{.}8$