In a day, each of them earns $10/hour * 10 hours/day = $<<10*10=100>>100/day
The total number of days each of them work in a month is five days per week * 4 weeks = <<5*4=20>>20 days
If each of them earns $100 per day, in 20 days, they'll earn 20 days/month * $100/day = $<<20*100=2000>>2000/month
Robby saves 2/5 * $2000 = $<<2/5*2000=800>>800 from his salary
Jaylene's savings is 3/5 * $2000 = $<<3/5*2000=1200>>1200 of her salary
Miranda saves 1/2 * $2000 = $<<2000*0.5=1000>>1000 from her salary.
The total saving for the three employees is $1000 + $1200 + $800 = $<<1000+1200+800=3000>>3000
#### 3000