While this query isn't perfect, it should provide you the data you need to make your analysis:
select
v.VENDORID Vendor_ID,
V.VENDNAME Vendor_Name,
PMAP.ACTNUMST AP,
PMCSH.ACTNUMST Cash,
PMDAV.ACTNUMST Discounts_Avail,
PMDTK.ACTNUMST Discounts_Taken,
PMFIN.ACTNUMST Finance_Charges,
PMMSCH.ACTNUMST Miscellaneous,
PMFRT.ACTNUMST Freight,
PMTAX.ACTNUMST Tax,
PMWRT.ACTNUMST Writeoffs,
PMPRCH.ACTNUMST Purchases,
PMTDSC.ACTNUMST Trade_Discount,
ACPUR.ACTNUMST Accrued_Purchases,
PURPV.ACTNUMST Purchase_Price_Variance,
GLD.ACTNUMST Alternate_Payables_Acct
from PM00200 V
left join PM00201 VA on V.VENDORID = VA.VENDORID
LEFT join PM00203 PA on V.VENDORID = PA.VENDORID
Left join GL00105 PMAP on PMAP.ACTINDX = V.PMAPINDX
Left Join GL00105 PMCSH on PMCSH.ACTINDX = V.PMCSHIDX
Left Join GL00105 PMDAV on PMDAV.ACTINDX = v.PMDAVIDX
Left Join GL00105 PMDTK on PMDTK.ACTINDX = v.PMDTKIDX
Left Join GL00105 PMFIN on PMFIN.ACTINDX = V.PMFINIDX
Left Join GL00105 PMMSCH on PMMSCH.ACTINDX = v.PMMSCHIX
Left Join GL00105 PMFRT on PMFRT.ACTINDX = V.PMFRTIDX
Left Join GL00105 PMTAX on PMTAX.ACTINDX = V.PMTAXIDX
Left Join GL00105 PMWRT on PMWRT.ACTINDX = V.PMWRTIDX
Left Join GL00105 PMPRCH on PMPRCH.ACTINDX = V.PMPRCHIX
Left Join GL00105 PMTDSC on PMTDSC.ACTINDX = V.PMTDSCIX
Left Join GL00105 ACPUR on ACPUR.ACTINDX = V.ACPURIDX
Left Join GL00105 PURPV on PURPV.ACTINDX = V.PURPVIDX
Left Join GL00105 GLD on PA.ACTINDX = GLD.ACTINDX