human
A merchant bought 15 keyboards and 25 printers for a total of $2050. If a keyboard costs $20, how much does a printer cost?
assistant
How much do the keyboards cost? ** 15 keyboards at $20 per keyboard cost a total of 15*$20=$<<15*20=300>>300
How much do the printers cost? ** The total cost of printers and keyboards is $2050 so 25 printers cost $2050-$300=$<<2050-300=1750>>1750
How much does a printer cost? ** 1 printer cost $1750/25=$<<1750/25=70>>70
#### 70