亲，能帮我看一下这个函数是什么意思吗？ =IF(OR(AND(C12<=0,D12<=0,E12<=0,F12<=0,C13<=0,D13<=0,E13<=0,F13<=0),AND(C12<=0,E12<=0,D12<=0,F12<=0)),"",IF(AND(C12>=0,D12>=0,E12>=0,F12>=0,C13<=0,D13<=0,E13<=0,F13<=0),(EOMONTH($B$42,0)+1-B12)*G12,IF(AND(C12>=0,D12>=0,E12>=0,F12>=0,C13>=0,D13>=0,E13>=0,F13>=0),(B13-B12)*G12,"")))