The total cost for the flour is 3 x $3 = $<<3*3=9>>9.
The total cost of the tray of eggs is 3 x $10 = $<<3*10=30>>30.
The total cost for the liter of milk is 7 x $5 = $<<7*5=35>>35.
The total cost for the box of baking soda is 2 x $3 = $<<2*3=6>>6.
Therefore, the total cost for all the ingredients is $9 + $30 + $35 + $6 = $<<9+30+35+6=80>>80.
#### 80