Answer:

The vendor gained ₱ 438

Step-by-step explanation:

Solution:

Number of apples he bought x price of each apple

So 90 x ₱ 19.50 = ₱1,755

But four apples had gone rotten so, 90-4= 86

then we multiply the number of apples he got now with

the amount he sold it for

So 86 x ₱25.50 = ₱2,193

And finally we subtract it with the amount we paid for the apples.

So ₱2,193- ₱1,755= ₱ 438

Therefore he gained ₱ 438