Data student - how to combine long function into shorter, cleaner code?

I’m working on an introductory class assignment to create multiple boxplots in a row based on specific subsets of a dataframe. I was able to successfully create the chart, but I’m sure there is a cleaner, shorter way to write the code I created. Any tips greatly appreciated.

My code:
Cars_Original=read.csv(“Cars.csv”, header = TRUE)
MPG_Combo = 0.6Cars_Original$MPG_City+0.4Cars_Original$MPG_Highway # combined mpg variable
cars=data.frame(Cars_Original, MPG_Combo) # data frame with MPG_Combo
SUV= cars[cars$Type==“SUV”,]
Sedan= cars[cars$Type==“Sedan”,]
Sports=cars[cars$Type==“Sports”,]
Wagon=cars[cars$Type==“Wagon”,]
Truck=cars[cars$Type==“Truck”,]
boxplot(
SUV$MPG_Combo,
Sedan$MPG_Combo,
Sports$MPG_Combo,
Wagon$MPG_Combo,
Truck$MPG_Combo,
ylab=“MPG_Combo”,
names=c(“SUV”,“Sedan”,“Sports”,“Wagon”,“Truck”)
)