5.14%
该企业此次筹资的资金成本率即该企业的加权平均资金成本率为:w=Σi*i(t=1.2.3...n)=[5000/(5000+3000)]x{[5000x7%x(1-33%)]/[5000x(1-5%)]}+[3000/(5000+3000)]x{[3000x8%x(1-33%)]/[3000x(1-2%)]}=5.14%。