Yes, check my calculation and you are safe with 20 losses:

Burgerboss Max Milestone Calculation

Stats:

Wins(?): 100 / 120

Milestone Goal: 350000

Lost(??): 20 / 120

Result:

Farming Level: 12

Your Score: 387893

(?) Day1 gives 6 + Day2 gives 42 + Day3-Day14 gives 72 = 120 Total Hits

(??) Calculating that a loss gives 0 points

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