Step 1: Average sales of Y from 2015 to 2020 = \( \dfrac{55790+65770+67060+75070+85060+90300}{6} = \dfrac{439050}{6} = 73175 \) kg.
Step 2: Revenue in 2021 = average sales x price per kg = \( 73175 \times 26 \).
Step 3: This gives Rs. 1902550, which matches option 1.