As you calculate the design cost for a site, you conclude it will be $50 per hour. However, your final estimate to the client will be for $55 per hour to include which cost (without including the cost as a line item)?

Incomplete question. I answered from a general budget perspective.

miscellaneous cost

Explanation:

Remember, we are told this is just an estimated cost of designing the site. Basically in designing a site, these costs are taken into account:

However, it seems the web developer may have discovered other miscellaneous costs attached to the site design.

which functions return a valid value without any arguments?

(-blank- and -blank- return a valid value without any arguments.)

1st -blank-

today

sqrt

count

2nd -blank-

round

now

sqrt