Ok, I wanted to see how much food you needed entirely, so I'll share my calculations which I hope are correct:
Level 1: 1 x 10 x 5= 50
Level 2: 4 x 10 x 5= 200
Level 3: 8 x 10 x 5= 400
Level 4: 20 x 10 x 5= 1,000
Level 5: 50 x 10 x 5= 2,500
Level 6: 100 x 10 x 5= 5,000
Level 7: 240 x 10 x 5= 12,000
Level 8: 500 x 10 x 5= 25,000
Level 9: 1000 x 10 x 5= 50,000
All Food Costs Added Together: 96,150
Edit-KP- Thanks for this!! Added information to Post 1
Yep, not gonna grow that much in time.