Reset value by UITableView sections - ios

Question

I am building a personal budget app that tracks my purchases. I have an NSDictionary of NSArray that looks like this:
{
46 = (
{
DATE = "11/14/2019";
ID = 21;
PLACE = Kroger;
PRICE = "23.32";
},
{
DATE = "11/14/2019";
ID = 22;
PLACE = Walmart;
PRICE = "12.54";
}
);
47 = (
{
DATE = "11/18/2019";
ID = 23;
PLACE = Cinco;
PRICE = "65.32";
}
);
}
The keys in the NSDictionary are determined by strftime using %W. Basically I have a set limit I can spend per week (i.e. 190) and I want in each titleForHeaderInSection: to have a total value that is determined by each field's PRICE in each key.
I currently have the following on the app:
The following calculate the NSDictionary listed above along with the total value:
Note: arrFoodInfo is a NSDictionary of just the entries without the week numbers
for (NSDictionary *dict in self.arrFoodInfo) {
NSString *date = [dict objectForKey:#"DATE"];
[totalPrices addObject:[dict objectForKey:#"PRICE"]];
for (NSString *price in totalPrices) {
if ([totalPrices containsObject:price]) {
_sumPrices += [price floatValue]; // Calculates total value
[totalPrices removeObject:price];
}
}
NSDateFormatter *SDF = [[NSDateFormatter alloc]
init];
[SDF setDateStyle:NSDateFormatterMediumStyle];
[SDF setDateFormat:#"MM/dd/yyyy"];
NSDate *convertedDate = [SDF dateFromString:date];
NSDateComponents *dateComponents = [calendar components:NSCalendarUnitYear | NSCalendarUnitWeekOfYear fromDate:convertedDate];
NSInteger week = dateComponents.weekOfYear;
NSInteger index = week;
NSNumber *key = #(index);
NSMutableArray *weekArray = weeksDictionary[key];
if (!weekArray) {
weekArray = [NSMutableArray array];
weeksDictionary[key] = weekArray;
}
[weekArray addObject:dict];
}
At the moment, I am getting the total of each PRICE but the total value should be different per section. What is the best option to determine this?