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
[tex]15\times x+75\\\\=15x+75[/tex]
now, Rate at which she sells the soap per kilogram = $18
so, Total earning will be
[tex]18x[/tex]
According to question,
[tex]15x+75=18x\\\\75=18x-15x\\\\75=3x\\\\x=\frac{75}{3}\\\\x=25[/tex]
So, the total cost of Pam's will be
[tex]15x+75\\\\=15\times 25+75\\\\=375+75\\\\=\$450[/tex]
Total sales will be
[tex]18x\\\\=18\times 25\\\\=\$450[/tex]
Hence, 25 kilograms she will manage.