Each year, johan typically does all his own land- scaping and yard work. he spends $200 per year on mulch for his f lower beds, $225 per year on f lowers and plants, $50 on fertilizer for his lawn, and $245 on gasoline and lawn mower maintenance. the lawn and garden store where he obtains his mulch and fertilizer charges other customers $500 for the service of spreading that much mulch in flower beds and $50 for the service of distributing fertilizer over a yard the size of johan’s. paying a profes- sional yard care service to mow his lawn would require an expenditure of $1,200 per year, but in that case johan would not have to buy gasoline or maintain his own lawn mower. a. in a normal year, how much does johan's landscaping and yard work contribute to gdp?