  From the world-sheet point of view we compute three, four and five point BPS
and non-BPS scattering amplitudes of type IIA and IIB superstring theory. All
these the mixed S-matrix elements including a closed string Ramond-Ramond (RR)
in the bulk and a scalar/gauge or tachyons with their all different pictures (
including RR in asymmetric and symmetric pictures) have been carried out.
  We have also shown that in asymmetric pictures various equations must be kept
fixed. More importantly, by direct calculations on upper half plane, it is
realized that some of the equations (that must be true) for BPS branes can not
be necessarily applied to non-BPS amplitudes. We also derive the S-Matrix
elements of $<V_C^{-2} V_{\phi}^{0}V _A^{0} V_T^{0} >$ and clarify the fact
that in the presence of the scalar field and RR, the terms carrying momentum of
RR in transverse directions play important role in the entire form of the
S-matrix and their presence is needed in order to have gauge invariance for the
entire S-matrix elements of type IIA (IIB) superstring theory.
