regarding pricing procedure

hi all,

in my company pricing procedure is already there.

but some times they faced some diffrent problem,like this

ex-

1- gross price- 100

packging- 10

________

110

tax 4%- 4.4

________

114.4

2. gross price- 100

tax 4%- - 4

__________

104

packaging- 10

-

114

so two prices are defferent

so which procedure is correct.

can i maintain two types of pricing procedre for same vendor.

if possible, then how.

regards,

susanta