Answer:
$720
Step-by-step explanation:
Data provided in the question:
Amount spent on mulch = $200
Amount spent on flowers and plants = $225
Amount spent on gasoline and lawn mower maintenance = $245
Amount spent on fertilizer for his lawn = $50
service of spreading = $500
service of distributing fertilizer = $50
expenditure = $1,200 per year
Now,
Johan's landscaping and yard work contribution to GDP
= Amount spent on mulch + Amount spent on flowers and plants + Amount spent on gasoline and lawn mower maintenance + Amount spent on fertilizer for his lawn
= $200 + $225 + $245 + $50
= $720
Hence,
Johan's landscaping and yard work contribution to GDP is $720