Please perform below $4$ steps to solve the task:

Read the problem statement.

Formulate the algorithm using pseudocode and top$-$down, stepwise refinement.

Write a C program.

Test, debug and execute the $C$ program

Task: One large chemical company pays its salespeople on a commission basis. The salespeople receive $$200$ per week plus $9\%$ of their gross sales for that week. For example, a salesperson who sells $$5000$ worth of chemicals in a week receives $$200$ plus $9\%$ of $$5000,$ or a total of $$650.$ Develop a program that will use scanf to input each salesperson's gross sales for last week and calculate and display that salesperson's earnings. Process one salesperson's figures at a time.

Here is a sample input$/$output dialog:

Enter sales in dollars $(-1$ to end$)$: $5000\mathrm{.}00$ Salary is: $$650\mathrm{.}00$

Enter sales in dollars $(-1$ to end$)$: $1234\mathrm{.}56$ Salary is: $$311\mathrm{.}11$

Enter sales in dollars $(-1$ to end$)$: $-1$