Answer: Hence, 25 kilograms she will manage to purchase and sell atleast.
Step-by-step explanation:
Let the number of each kilogram of soap be x
Amount she spent to purchase soap making equipment = $75
Amount she spent to purchase the material for each kilogram of soap = $15
So, total expenditure will be

now, Rate at which she sells the soap per kilogram = $18
so, Total earning will be

According to question,

So, the total cost of Pam's will be

Total sales will be

Hence, 25 kilograms she will manage.