code javascript: Given a list of transactions within one year, calculate the final balance of an account. Add a fee for each month that did not include at least three card payments for a total sum of at least $100.$

Task description

You are given a list of all the transactions on a bank account during the year $2020.$ The account was empty at the beginning of the year $($the balance was $0).$

Each transaction specifies the amount and the date it was executed. If the amount is negative $($less than $0)$ then it was a card payment, otherwise it was an incoming transfer $($amount at least $0).$ The date of each transaction is in YYYY$$MM$$DD format: for example, $20200520$ represents $20$th May $2020.$

Additionally, there is a fee for having a card $($omitted in the given transaction list$),$ which is $5$ per month. This fee is deducted from the account balance at the end of each month unless there were at least three payments made by card for a total cost of at least $100$ within that month.

Your task is to compute the final balance of the account at the end of the year $2020.$

Write a function:

function solution$($A$,$ D$)$;

that, given an array A of N integers representing transaction amounts and an array D of N strings representing transaction dates, returns the final balance of the account at the end of the year $2020.$ Transaction number K $($for K within the range $[0..$N$-1])$ was executed on the date represented by D$[$K$]$ for amount A$[$K$].$

Examples:

$1.$ Given A $=[100,100,100,10]$ and D $=["20201231","20201222","20201203","20201229"],$ the function should return $230.$ Total income was equal to $100+100+10010=290$ and the fee was paid every month, so $290-(5*12)=230.$

$2.$ Given A $=[180,-50,-25,-25]$ and D $=["20200101","20200101","20200101","20200131"],$ the function should return $25.$ The income was equal to $180,$ the expenditure was equal to $100$ and the fee was applied in every month except January: $180-100-(5*11)=25.$

$3.$ Given A $=[1,-1,0,-105,1]$ and D $=["20201231","20200404","20200404","20200414","20200712"],$ the function should return $-164.$ The fee is paid every month. $1-1+0-105+1-(5*12)=-164.$ Note that in April, even though the total cost of card payments was $106($more than $100),$ there were only two payments made by card, so the fee was still applied. A transaction of value $0$ is considered a positive, incoming transfer.

$4.$ Given A $=[100,100,-10,-20,-30]$ and D $=["20200101","20200201","20200211","20200205","20200208"],$ the function should return $80.$

$5.$ Given A $=[-60,60,-40,-20]$ and D $=["20201001","20200202","20201010","20201030"],$ the function should return $115.$

Assume that:

$$ N is an integer within the range $[1.\mathrm{.}100]$;

$$ each element of array A is an integer within the range $[1,000.\mathrm{.}1,000]$;

$$ D contains strings in YYYY$$MM$$DD format, representing dates in the range $20200101$ to $20201231.$

In your solution, focus on correctness. The performance of your solution will not be the focus of the assessment.