diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.js b/erpnext/accounts/doctype/sales_invoice/sales_invoice.js
index 747d0a9..1808005 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.js
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.js
@@ -820,7 +820,7 @@
 	},
 
 	add_timesheet_row: function(frm, row, exchange_rate) {
-		frm.add_child('timesheets',{
+		frm.add_child('timesheets', {
 			'activity_type': row.activity_type,
 			'description': row.description,
 			'time_sheet': row.parent,
@@ -828,7 +828,8 @@
 			'billing_amount': flt(row.billing_amount) * flt(exchange_rate),
 			'timesheet_detail': row.name
 		});
-		frm.refresh_field('timesheets')
+		frm.refresh_field('timesheets');
+		calculate_total_billing_amount(frm);
 	},
 
 	refresh: function(frm) {
@@ -871,36 +872,32 @@
 								project: data.project
 							},
 							callback: function(r) {
-								if(!r.exc) {
-									if(r.message.length > 0) {
-										frm.clear_table('timesheets')
-										r.message.forEach((d) => {
-											let exchange_rate = 1.0;
-											if (frm.doc.currency != d.currency) {
-												frappe.call({
-													method: "erpnext.setup.utils.get_exchange_rate",
-													args: {
-														from_currency: d.currency,
-														to_currency: frm.doc.currency
-													},
-													callback: function(r) {
-														if (r.message) {
-															exchange_rate = r.message;
-															frm.events.add_timesheet_row(frm, d, exchange_rate);
-														}
+								if (!r.exc && r.message.length > 0) {
+									frm.clear_table('timesheets')
+									r.message.forEach((d) => {
+										let exchange_rate = 1.0;
+										if (frm.doc.currency != d.currency) {
+											frappe.call({
+												method: 'erpnext.setup.utils.get_exchange_rate',
+												args: {
+													from_currency: d.currency,
+													to_currency: frm.doc.currency
+												},
+												callback: function(r) {
+													if (r.message) {
+														exchange_rate = r.message;
+														frm.events.add_timesheet_row(frm, d, exchange_rate);
 													}
-												});
-											}
-											else {
-												frm.events.add_timesheet_row(frm, d, exchange_rate);
-											}
-										});
-									}
-									else {
-										frappe.msgprint(__('No Timesheet Found.'))
-									}
-									d.hide();
+												}
+											});
+										} else {
+											frm.events.add_timesheet_row(frm, d, exchange_rate);
+										}
+									});
+								} else {
+									frappe.msgprint(__('No Timesheets found with the selected filters.'))
 								}
+								d.hide();
 							}
 						});
 					},
diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.json b/erpnext/accounts/doctype/sales_invoice/sales_invoice.json
index 48d644c..e7dd6b8 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.json
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.json
@@ -772,6 +772,7 @@
    "hide_days": 1,
    "hide_seconds": 1,
    "label": "Total Billing Amount",
+   "options": "currency",
    "print_hide": 1,
    "read_only": 1
   },
@@ -1960,7 +1961,7 @@
    "label": "Is Debit Note"
   },
   {
-   "default": 0,
+   "default": "0",
    "depends_on": "grand_total",
    "fieldname": "disable_rounded_total",
    "fieldtype": "Check",
@@ -1977,7 +1978,7 @@
    "link_fieldname": "consolidated_invoice"
   }
  ],
- "modified": "2021-05-13 17:53:26.185370",
+ "modified": "2021-05-20 22:48:33.988881",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Sales Invoice",
diff --git a/erpnext/accounts/doctype/sales_invoice_timesheet/sales_invoice_timesheet.json b/erpnext/accounts/doctype/sales_invoice_timesheet/sales_invoice_timesheet.json
index 9321630..f069e8d 100644
--- a/erpnext/accounts/doctype/sales_invoice_timesheet/sales_invoice_timesheet.json
+++ b/erpnext/accounts/doctype/sales_invoice_timesheet/sales_invoice_timesheet.json
@@ -34,6 +34,7 @@
    "fieldtype": "Currency",
    "in_list_view": 1,
    "label": "Billing Amount",
+   "options": "currency",
    "read_only": 1
   },
   {
@@ -64,7 +65,7 @@
  ],
  "istable": 1,
  "links": [],
- "modified": "2021-05-13 16:52:32.995266",
+ "modified": "2021-05-20 22:33:57.234846",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Sales Invoice Timesheet",
diff --git a/erpnext/projects/doctype/timesheet/timesheet.py b/erpnext/projects/doctype/timesheet/timesheet.py
index d42c6ab..a3e4577 100644
--- a/erpnext/projects/doctype/timesheet/timesheet.py
+++ b/erpnext/projects/doctype/timesheet/timesheet.py
@@ -342,9 +342,9 @@
 		rate = frappe.db.get_values("Activity Type", {"activity_type": activity_type},
 			["costing_rate", "billing_rate"], as_dict=True)
 		if rate and currency and currency!=base_currency:
-			exchnage_rate = get_exchange_rate(base_currency, currency)
-			rate[0]["costing_rate"] = rate[0]["costing_rate"] * exchnage_rate
-			rate[0]["billing_rate"] = rate[0]["billing_rate"] * exchnage_rate
+			exchange_rate = get_exchange_rate(base_currency, currency)
+			rate[0]["costing_rate"] = rate[0]["costing_rate"] * exchange_rate
+			rate[0]["billing_rate"] = rate[0]["billing_rate"] * exchange_rate
 
 	return rate[0] if rate else {}