how can we show the service or installation and labour charges with material invoice and what rate applicable on this type of services

Products
Dvr
Camera hd
Power supply
Hard disk
Bnc connector
Power connector
CCTV cable
Vga cable
HDMI cable
Cat 6 cable
Telephone cable
Telephone
Epabx machine
Nvr
Ip camera
Network switch's
Computer network rack
WiFi modam
WiFi link
Attandance machine
Access control machine
GPS divice
PVC pipe
PVC casing
Computer accessories

Services
Labour charges
Amc contracts
Installation charges
Repairing charges
Pipe fittings charges
Wiring