Step 1. Go to foundry Missions.
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1.1 - Use the search bar on the top of the mission list
And Set search criteria to "Custom" And type in the search box,
"Farm".
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Step 2.Choose The farm mission you wish In my opinion Fed 102 is best.
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2.1 - Follow the directions of mission to start the mission.
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2.2 - You should spawn In a specific point, It is best not to move And then just kill the Enemys who should spawn in same point every time.
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2.3 - Pick up there loot as almost each ship drops at least 1 item (Not Consumables) then there is 2 options
1. Sell from replicator = Less Credits (20% Value Loss)
2. Sell at ESD = More Credits
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Note: This mission can be repeated till you reach your daily limit then you can come back and do it again tomorrow.

And could people who try this out, if you do please comment if you found it useful if you didn't already know this...Thanks