Given that number of "Hours worked" is entered into cell B7.
Given that "Hourly rate" is entered into cell D7.
Given that "Overtime hours" is entered into cell C7.
And the salary is calculated into cell E7.
Now we need to write formula for salary which needs to be entered into cell E7.
Salary = [Hours worked]*[Hourly rate] + [Overtime hours]*[Hourly rate]*[1.5]
[E7] = [B7]*[D7] +[C7]*[D7]*[1.5]
Hence final answer that you need to type in cell E7 is "=B7*D7+C7*D7*1.5".