problem in countifs formula

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hi all,
i am trying to count the total no. of 'tea' from c2:f21 in this sheet for all 'monday'.
for this i am using =COUNTIFS($B$2:$B$21,"=Monday",$C$2:$F$21,"=tea") , but this is showing error, while its working for
=COUNTIFS($B$2:$B$21,"=Monday",$C$2:$C$21,"=tea") because here i am calculating the single column (c) only.
pls help to solve this problem.
is there any other formula to calculate from c2:f21?
thanks