Hints

1. Calculate the day rate given an hourly rate

Use the arithmetic operators as mentioned in the introduction of this exercise.

2. Calculate the number of workdays given a budget

First determine the day rate, then calculate the number of days, and finally round that number down.

3. Calculate the discounted rate for large projects

Round down the result from division to get the number of full months.
100% - discount equals the percentage charged after the discount is applied.
Use %, the remainder operator, to calculate the number of days exceeding full months.
Add the discounted month rates and full day rates and round it up