Countable Quantity

[Josephine Kim]

Last Month ten boxes of food _____ collected thanks to kind shoppers like you.

I think it's "were", but the answer is "is".
I cannot understand because "food" is a non-count noun but there is countable quantity "ten boxes of".
Also, "Last month" indicates past time.
If it is singular, why it is not "was"?

T_T

[5jj]

You are right. It should be 'were'.

[Josephine Kim]

Thank you very very much >_<