any1 here doing monthly investment (standing instruction) to ur UT fund?

i've been doing this for 2 yrs, investing rm100 monthly in pittikal fund, fund price was 0.7++ back then n now 0.9++

i would like to know how to calculate the overall earnings from initial invested amount (rm1000) plus monthly input (rm100) for a period of 24 months. can any sifu here guide me or provide formulas?