I have input piped to awk on a macOS system. I want the sum of two decimal values. One occurs every second row, the other is on every fourth row. I want the result of the sum on every fifth row. The values are delimited by colon+space before, and a comma after. Every sixth row is empty. This pattern repeats until end of the input.

```
BB: 728345643856359022, 
SH: 3560836, 
RJ: 1500369, 
DD: 1403849, 
Total:,

BB: 729586953244932948, 
SH: 8560836, 
RJ: 4700360, 
DD: 3403021, 
Total:,

BB: 821334125345384020, 
SH: 5293431, 
RJ: 2642499, 
DD: 2433292, 
Total:,

```

If relevant, `which awk` outputs `/usr/bin/awk` and `brew list --version` outputs `gawk 5.2.1_1`. Is this possible in g/awk? Any advice appreciated!

To format the input I am using:

```
getlist | awk '{print $1 $2}' \
| grep 'BB\|SH\|RJ\|DD' \
| sed 's/"//g' \
| awk '{print;} NR % 4 == 0 { print "Total:,";}' \
| awk '{print;} NR % 5 == 0 { print "";}' \
| awk '{print $1 $2}'

```

**Expected output**

```
BB: 728345643856359022, 
SH: 3560836, 
RJ: 1500369, 
DD: 1403849, 
Total: 4964685,

BB: 729586953244932948, 
SH: 8560836, 
RJ: 4700360, 
DD: 3403021, 
Total: 11963857,

BB: 821334125345384020, 
SH: 5293431, 
RJ: 2642499, 
DD: 2433292, 
Total: 7726723,

```