You are preparing a flexible budget for next year. Fuel for delivery vehicles is a semi-variable cost, the variable element of which is proportional to sales income. For sales income of £10 million the delivery vehicle fuel budget is £300000 For sales income of £20 million, the delivery vehicle fuel budget is £470356 What is the delivery vehicle fuel budget for sales income of £30 million? Enter your answer as a whole number of £ to the nearest £, without commas For example, for £500,025.25 enter 500025.