I understand the concept, but I'm not sure how to apply it to the questions. can anyone help?

Roofer A You have to replace your roof and have the following financing options offered by different roofers for the same job costing 518,000, when the market interest rate is 3.6% 3 year financing plan, monthly payments at end of each month, they said they only charge you a 3.25% atual interest rate, plus some loan closing cost in additional to the $18,000 cost of the roof Based on their calculation, your monthly payment is 5551.57 for 36 payments. Roofer No payment in the first 12 month after that, a four-year financing plan at the market rate. They calculated the monthly payment (end of month) of 429.58 for 48 months Roofer B made it clear that there are loan closing cost of 500, included in the caluation and they always use monthly compounding in calculating interests and payments. Required What is the loan closing cost for Roofer A? For Roofer B. is there interest charges in the first 12 months when there is no payments required? If so, what ate? Complete the following schedule to show the balance at different time point, if you go for Roofer B C. payment interest rate interest expertise pay-back of project price balance on project 18500 D 0 Beginning end of Month 1 end of Month 2 end of Month end of Month 4 end of Months end of Month 6 end of Month end of Month end of Month 9 end of Month 10 end of Month 11 end of Month 12 0 D Roofer A You have to replace your roof and have the following financing options offered by different roofers for the same job costing 518,000, when the market interest rate is 3.6% 3 year financing plan, monthly payments at end of each month, they said they only charge you a 3.25% atual interest rate, plus some loan closing cost in additional to the $18,000 cost of the roof Based on their calculation, your monthly payment is 5551.57 for 36 payments. Roofer No payment in the first 12 month after that, a four-year financing plan at the market rate. They calculated the monthly payment (end of month) of 429.58 for 48 months Roofer B made it clear that there are loan closing cost of 500, included in the caluation and they always use monthly compounding in calculating interests and payments. Required What is the loan closing cost for Roofer A? For Roofer B. is there interest charges in the first 12 months when there is no payments required? If so, what ate? Complete the following schedule to show the balance at different time point, if you go for Roofer B C. payment interest rate interest expertise pay-back of project price balance on project 18500 D 0 Beginning end of Month 1 end of Month 2 end of Month end of Month 4 end of Months end of Month 6 end of Month end of Month end of Month 9 end of Month 10 end of Month 11 end of Month 12 0 D