How to sum a sub element of array [numberOfPay]?

[Issah_1]

  [
{
    "": {
        "amount": "152870",
        "kwh": "0",
        "numberOfPay": "54"
    }
},
{
    "AZARE Region": {
        "amount": "119500",
        "kwh": "0",
        "numberOfPay": "45"
    }
},
{
    "BAUCHI Region": {
        "amount": "944473",
        "kwh": "0",
        "numberOfPay": "376"
    }
},
{
    "BUKURU Region": {
        "amount": "494000",
        "kwh": "0",
        "numberOfPay": "138"
    }
},
{
    "GBOKO Region": {
        "amount": "265335",
        "kwh": "0",
        "numberOfPay": "73"
    }
},
{
    "GOMBE Region": {
        "amount": "756301",
        "kwh": "0",
        "numberOfPay": "308"
    }
},
{
    "JOS METRO Region": {
        "amount": "718000",
        "kwh": "0",
        "numberOfPay": "229"
    }
},
{
    "MAKURDI Region": {
        "amount": "1210602",
        "kwh": "0",
        "numberOfPay": "196"
    }
},
{
    "OTUKPO Region": {
        "amount": "712595",
        "kwh": "0",
        "numberOfPay": "206"
    }
}

]

[pritaeas]

echo array_sum(array_column($items, 'numberOfPay'));

Here's a nice description of several options:
https://www.designcise.com/web/tutorial/how-to-sum-values-of-an-array-with-the-same-key-in-php