library(readr)
fed_stimulus <- read.csv("fed_stimulus.csv")
sum(fed_stimulus$Payment.Value, na.rm = TRUE)
## [1] 3180464994
mean(fed_stimulus$Contract.Value, na.rm = TRUE)
## [1] 14894004
completed50 <- subset(fed_stimulus, fed_stimulus$"Project Status"=="Completed 50% or more")