callPayoff <- function(S, E) pmax(0, S - E)

RogerFederer <- function(S){
  call1<-callPayoff(S,2175)
  call2<-callPayoff(S,2120)
  3*((call1-42.35)+(-call2+66.75))
}

mivena <- function(S)
{ 
  call1<-callPayoff(S,2120) 
  call2<-callPayoff(S,2175) 
  4*((-call1+66.75)+(+call2-29.55)) 
} 

KaDAl <- function(S){
  call1 = callPayoff(S,2145)
  call2 = callPayoff(S,2155)
  -20*(call1-55.6)+20*(call2-50.45) 
}

LES <- function(S){
  call6<-callPayoff(S,2145)  
  call7<-callPayoff(S,2150)  
  45*(-call6+55.60) + 45*(call7-52.80)
}

S <- 2100:2200
zisk <- data.frame(RogerFederer(S), mivena(S), KaDAl(S), LES(S))

matplot(S, zisk, lty = 1, type = "l")
abline(h = 0, col = "grey", lty = 2)
legend("topright",
       c("RogerFederer", "mivena", "KaDAl", "LES"),
       lty = 1,
       col = 1:4)