Conditional subtraction

Question

I have a big data.frame (TOTAL) with some values (cols11-16) that I need to subtract a base from which is multiplied by a value depending on two conditions in TOTAL.

The data.frame (TOTAL) looks a little like this

Channel    Hour      Category cols11 cols12 cols13 cols14 cols15 base
TV1        04:00:00  New      2      5      4      5      6      2,4
TV5        05:00:00  Old      1      5      3      9      7      1,8
TV1        03:00:00  New      8      7      9      2      4      5,4

There are 4 different channels, and 24 different hours (00:00:00-23:00:00)

I have four other vectors with the conditionedvariable that needs to be multiplied on the base depending on the Hour and the Channel, So for each channel I have a vector like this:

TV1Slope:
TV1Slope00 TV1Slope01 TV1Slope02.. TV1Slope23
0,0012      0,0015    0,013       0,0009


TOTAL$Uplift0 <- (TOTAL$cols11 - TOTAL$base * conditionedvariable)
TOTAL$Uplift1 <- (TOTAL$cols12 - TOTAL$base * conditionedvariable)
TOTAL$Uplift2 <- (TOTAL$cols13 - TOTAL$base * conditionedvariable)
TOTAL$Uplift3 <- (TOTAL$cols14 - TOTAL$base * conditionedvariable)
TOTAL$Uplift4 <- (TOTAL$cols15 - TOTAL$base * conditionedvariable)

How do I make R choose the conditioned variable based on the conditions?