IshGen 208:21 :ܟܣܦܐ ܡܝܪܗ܂ ܗܢܘ܂ ܟܣܦܐ ܕܙܒܝܢܘܬܗ‏ : exchange price: i.e., purchase price
See the entire entry for zbī̱nū, zbī̱nūṯā n.f. purchase