The past tense of “cost” is cost or costed. The past participle of “cost” is cost or costed. The infinitive form of “cost” is cost. The present participle of “cost is costing.
So, Both are Correct
Use the simple past tense of cost in American and British English. And use costed if you are writing or speaking to a Canadian audience. You can also use cost if you're referring to the linking verb and costed for the action verb.
The past tense of cost is cost or costed. The third-person singular simple present indicative form of cost is costs. The present participle of cost is costing. The past participle of cost is cost or costed.
transitive verb
costed out; costed out; costing out; costs out. : to calculate in advance the total cost of (as a project or proposal)
Word forms: plural, 3rd person singular present tense costs , present participle costing language note: The form cost is used in the present tense, and is also the past tense and past participle, except for meaning [sense 4], where the form costed is used.
verb (used with object),cost or, for 10, cost·ed;cost·ing. to require the payment of (money or something else of value) in an exchange: That camera cost $200. to result in or entail the loss of: Carelessness costs lives.
To estimate the monetary worth of. value. evaluate. assess. estimate.
Verb. costed. simple past and past participle of cost quotations ▼
However, if you use 'cost (out)' as an action verb to mean to determine or estimate how much something will cost you, then you can use costed as past tense and past participle. For examples: We haven't yet costed (out) the proposal. The project was costed (out) at $2.5 million.
costs - Simple English Wiktionary.
The present continuous tense of 'cost' consists of either 'is costing', 'am costing' or 'are costing' and can be used in the following ways: They/we/are costing me a lot of money.
Costing is any system for assigning costs to an element of a business. Costing is typically used to develop costs for customers, distribution channels, employees, geographic regions, products, product lines, processes, subsidiaries, and entire companies.
'Bought' is the past tense of 'buy'.
cost verb (MONEY)
[ + two objects ] It's going to cost me a lot of money to buy a new car. The holiday cost them over two thousand pounds. It cost an awful lot of money. The new building project will cost $45 million.
costed is a valid English word.
adjective,cost·li·er, cost·li·est. costing much; expensive; high in price: a costly emerald bracelet; costly medical care.
The past tense in English describes events that have already happened. How to form the past tense in English: take the present tense of the word and add the suffix "-ed"" . For example, to turn the verb "walk" into the past tense, add "-ed" and you get "walked."
Past Costs:
Actual costs or historical costs are records of past costs. Future costs are based on forecasts. The costs relevant for most managerial decisions are forecasts of future costs or comparative conjunctions concerning future situations.
Answer and Explanation:
'Of' is most often used to mean that the subject of the sentence belongs to the object. Example: The cost of the gym membership was higher than he thought. 'For' is an indicator of use related to something else. Example: He discovered that there was a high cost for belonging to the gym.
Ate and eaten are two forms of the irregular verb eat. Ate is the past tense form and eaten is the past participle form.