Question 761204
Basic Method:
Area to fertilize;
How many bags;
What cost for the needed fertilizer.


Area to cover:  {{{80*20 *3*3}}} because you want as square feet.


Number of bags:  {{{80*20*3*3*(1/100)}}} because 1 bag covers 100 square feet.


Cost:  {{{80*20*3*3*(1/100)*7.50}}} dollars, using the bag price