Hello, I am confused as to how the following is a solution to this problem:

```
for i in range(int(input())):
N,K,X,Y=map(int,input().split())
if X>Y :
money=(K*X)+(N-K)*Y
else:
money=N*X
print(money)
```

But this wouldn’t be:

```
for i in range(int(input())):
n,k,x,y = map(int,input().split())
bluelamps = n-k
redlamps = k
costb = bluelamps*y
costr = redlamps*x
print(costb+costr)
```

Can some please explain in beginner terms?