Answer:
To calculate Sharmila's combined monthly income, we need to consider both her fixed salary and the commission she earns based on her sales.
(i) Let's calculate her combined monthly income for a month where the total sale is Rs. 1,70,000:
Step 1: Calculate the commission earned on sales
Commission = 2.5% of total sale
Commission = (2.5/100) * 1,70,000
Commission = Rs. 4,250
Step 2: Add the fixed salary and commission to get the combined monthly income
Combined Monthly Income = Fixed Salary + Commission
Combined Monthly Income = Rs. 20,000 + Rs. 4,250
Combined Monthly Income = Rs. 24,250
So, Sharmila's combined monthly income for a month with total sales of Rs. 1,70,000 is Rs. 24,250.
(ii) Now, let's calculate the amount of sales for the month when Sharmila's income was Rs. 25,625:
Step 1: Subtract the fixed salary from the total income to find the commission earned
Commission = Total Income - Fixed Salary
Commission = Rs. 25,625 - Rs. 20,000
Commission = Rs. 5,625
Step 2: Calculate the total sale amount corresponding to this commission
Total Sale = Commission / (Commission Rate)
Total Sale = Rs. 5,625 / (2.5/100)
Total Sale = Rs. 5,625 / 0.025
Total Sale = Rs. 2,25,000
So, in the month when Sharmila's income was Rs. 25,625, the total sales were Rs. 2,25,000.