Uki earns 20 x $1.50 = $<<20*1.5=30>>30 in selling 20 cupcakes.
She earns 10 x $2 = $<<10*2=20>>20 for selling 10 packets of cookies,
Additionally, she earns another 20 x $1 = $<<20*1=20>>20 for selling twenty packets of biscuits.
Thus, in a day, she earns an average of $30 + $20 + $20 = $70.                                                                       Therefore, for five days, Uki earns 5 x $70 = $<<5*70=350>>350.  "
#### 350