=sum inbetween 2 dates used in v lookup

i want to sum the values between 2 dates (dates are in column c, and i want to sum all values corresponding to the dates inbetween these two dates, values are in column i)

i was using v loop up to find the position of the dates but i couldnt get it to work, any idea how i could do it

the 2 dates are in c3 and e3

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if anyone wants to email back to me u can on davidallen@iprimus.com.au