Answer:
$585 dollars will be used for cleaning supplies out of the total of $900 that was collected over the six days.
Explanation:
$150.00 (money each day) * 6 (number of days) = $ (total)

$900 in 6 days
100% (total amount) - 35% (pet food) = % (cleaning supplies)

65% of his money will be used for cleaning supplied
Change the percentage into a decimal
65% =

Multiply the total amount of money by the decimal

Out of the total $900 dollars he collected over 6 days, $585 dollars will be used for cleaning supplies and the rest ($315) will be used on pet food.