Answer:
After 6 monthsStep-by-step explanation:
After 6 months
For the cost of old fridge, there are two costs involved. i) electricity charges ii) maintenance cost
electricity charges = charge per month x number of months = 19x6 = $114
maintenance charges for the 10 years = $220
for one year, maintenace charges = 220/10 = $22
for the 6 months, maintenance charges = $11
cost of the old fridge = 114 + 11 = $125
cost the new fridge after 6 months = 6x6 =$36
After 10 years
For the cost of old fridge, there are two costs involved. i) electricity charges ii) maintenance cost
electricity charges = charge per month x number of months = 19x10x12 = $2280
maintenance charges for the 10 years = $220
cost of the old fridge =2280 + 220 = $2500
cost of the new fridge =6x10x12 = $720