A kilogram of pork costs $6 while a kilogram of chicken costs $2 less. How much will a 3-kilogram of chicken and a kilogram of pork cost?
A kilogram of chicken costs $6 - $2 = $<<6-2=4>>4.
Three kilograms of chicken cost $4 x 3 = $<<4*3=12>>12.
So, a 3-kilogram of chicken and a kilogram of pork cost $12 + $6 = $18.
#### 18