Assign a number based on criteria in two columns

Hello,
Id like to automate the assigning of a number in Column C for each person added to the spreadsheet. Annually there are ~900 people added. The number generated is based on the following.
Column D variables are: 5, 6, 7 or 8
Column E variables are: F or M

The first number for each combination are:
5F=1000
5M=2000
6F=3000
6M=4000
7F=5000
7M=6000
8F=7000
8M=8000

The first Cell is C2

On the attached txt file I went through the possible combinations for the first two rows. I can get the numbers to increase with a looping 5F=5F+1 for example but that's about as far as I get to automating the number calculation unfortunately!
Any help on how to achieve this would be greatly appreciated.
Thank you.

Hi
Try this in C2

Formula:

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Thank you. I appreciate you looking at this for me. It's not quite what I need unfortunately.
I have attached a file with 2 columns of demo data, what I need in the desired outcome column and your formula in Column C.
Hopefully it shows the required numbering scheme more clearly.
Thank you once again.

Try this ...

=D2*2000-IF(E2="M",8000,9000)+COUNTIFS($C$1:C1,C2,$E$1:E1,E2)

Thank you for this.
It appears the number remain at the thousand rather than increasing. ie 5M = 2000, next 5M = 2001 etc
I'm sorry if I am not explaining this well.
Thank you.

Thanks Phuocam.
When I paste this in C2 I get a warning about a circular reference. The result in C2 = 0
Thank you for looking at this.

Edit:

=D2*2000-IF(E2="M",8000,9000)+COUNTIFS($D$1:D1,D2,$E$1:E1,E2)

Thank you Phuocam.
That is perfect. I'm amazed at how compact the formula is to achieve what we are after.
If you have the time and energy I'd be very interested to try and understand it.
why *2000? Why only include 8000 and 9000 and not the other starting numbers.
That sort of thing.
Perfectly understand if you are not able to.
Thanks once again and also thanks to everyone who posted a reply.
Cheers.

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