Anyone know how to change the format of the currency in chart script report?

Can anyone help me how to set currency format in script report. I have tried this script format but it doesn’t change to currency.

chart = {
	"data": {
		"labels": all_projects,
		"datasets": [
			{
				"name": "Costing",
				"values": [project_costing.get(p, 0) for p in all_projects]
			},
			{
				"name": "Billing",
				"values": [project_billing.get(p, 0) for p in all_projects]
			}
		]
	},
	"type": "bar",
	"currency": "USD",
	"format": "currency"
}