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Program #$01$:

Create a program that reads the sales for $12$ months from a file and calculates the total yearly sales as

well as the average monthly sales. In addition, this program should let the user edit the sales for any

month.

Console:

Monthly Sales program

COMMAND MENU

monthly $-$ View monthly sales

yearly $-$ View yearly summary

edit $-$ Edit sales for a month

exit $-$ Exit program

Command: monthly

Jan $-14317$

Feb $-3903$

Mar $-1073$

Apr $-3463$

May $-2429$

Jun $-4324$

Jul $-9762$

Aug $-15578$

Sep $-2437$

Oct $-6735$

Nov $-88$

Dec $-2497$

Command: yearly

Yearly total: $66606$

Monthly average: $5550\mathrm{.}5$

Command: edit

Three$-$letter Month: Nov

Sales Amount: $8854$

Sales amount for Nov was modified.

Command: exit

Bye!

Specifications

$$ Use a CSV file named monthly$\_$sales.csv that contains the month and sales data shown above.

$$ For the edit command, display an error message if the user doesn$$t enter a valid three$-$letter

abbreviation for the month.

$$ When the user edits the sales amount for a month, the data should be saved to the CSV file

immediately. That way, no data is lost, even if the program crashes later.

$$ Round the results of the monthly average to a maximum of $2$ decimal digits.