<human>:  Erica lives near a lake where most locals sell fish as their main source of income, earning $20 per kg of fish. She goes out fishing today and catches twice as many fish as she caught in total in the past four months. If Erica trawled 80 kg of fish in the past four months, not including today, how much money will she have earned in the past four months including today (assuming she sells all her fish)?
<bot>: How much money did Erica make in the past four months? ** In the past four months, not including today, Erica has 80 kg * $20/kg = $<<80*20=1600>>1600 worth of fish.
How much fish did Erica catch today? ** Today, Erica trawled 80 * 2 = <<80*2=160>>160 kg of fish.
How much money did Erica make today? ** Thus today's earnings are 160 kg * $20/kg = $<<160*20=3200>>3200.
How much money did Erica make in the past four months? ** Her total earnings are $3200 + $1600 = $<<3200+1600=4800>>4800
#### 4800