使用sum+countif对多个(确切地说是26个)选项卡/表格中的项目进行计数

Question

我有一个日程安排程序，在该程序中，我将在26个支付期内统计某些班次，每个时段都有自己的选项卡或工作表。我下面的例子是把两种夜班加起来。。。P&P8，在26个选项卡/页的特定行(C4:P4(中，但它相当笨拙。有更好的方法吗？

=sum(countif({
'PP1'!C4:P4,
'PP2'!C4:P4,
'PP3'!C4:P4,
'PP4'!C4:P4,
'PP5'!C4:P4,
'PP6'!C4:P4,
'PP7'!C4:P4,
'PP8'!C4:P4,
'PP9'!C4:P4,
'PP10'!C4:P4,
'PP11'!C4:P4,
'PP12'!C4:P4,
'PP13'!C4:P4,
'PP14'!C4:P4,
'PP15'!C4:P4,
'PP16'!C4:P4,
'PP17'!C4:P4,
'PP18'!C4:P4,
'PP19'!C4:P4,
'PP20'!C4:P4,
'PP21'!C4:P4,
'PP22'!C4:P4,
'PP23'!C4:P4,
'PP24'!C4:P4,
'PP25'!C4:P4,
'PP26'!C4:P4
},"P"),countif({
'PP1'!C4:P4,
'PP2'!C4:P4,
'PP3'!C4:P4,
'PP4'!C4:P4,
'PP5'!C4:P4,
'PP6'!C4:P4,
'PP7'!C4:P4,
'PP8'!C4:P4,
'PP9'!C4:P4,
'PP10'!C4:P4,
'PP11'!C4:P4,
'PP12'!C4:P4,
'PP13'!C4:P4,
'PP14'!C4:P4,
'PP15'!C4:P4,
'PP16'!C4:P4,
'PP17'!C4:P4,
'PP18'!C4:P4,
'PP19'!C4:P4,
'PP20'!C4:P4,
'PP21'!C4:P4,
'PP22'!C4:P4,
'PP23'!C4:P4,
'PP24'!C4:P4,
'PP25'!C4:P4,
'PP26'!C4:P4
},"P8"))

Answer 1

try:

=SUM(INDEX(N(REGEXMATCH({
'PP1'!C4:P4,
'PP2'!C4:P4,
'PP3'!C4:P4,
'PP4'!C4:P4,
'PP5'!C4:P4,
'PP6'!C4:P4,
'PP7'!C4:P4,
'PP8'!C4:P4,
'PP9'!C4:P4,
'PP10'!C4:P4,
'PP11'!C4:P4,
'PP12'!C4:P4,
'PP13'!C4:P4,
'PP14'!C4:P4,
'PP15'!C4:P4,
'PP16'!C4:P4,
'PP17'!C4:P4,
'PP18'!C4:P4,
'PP19'!C4:P4,
'PP20'!C4:P4,
'PP21'!C4:P4,
'PP22'!C4:P4,
'PP23'!C4:P4,
'PP24'!C4:P4,
'PP25'!C4:P4,
'PP26'!C4:P4}, "^P8$|^P$"))))